Selling return goods on Marktplaats and similar platforms can be done in two ways: you sell sorted items individually, or you sell sealed parcels as mystery boxes. Both models work, but they require different work, different prices and different attention to platform rules. This article lines up the differences and tells you when which model pays off best.
Per item or per box: two ways to sell return goods online
When selling per item, you open the lot, sort the items, test whatever can be tested and list every sellable unit as a separate advert. The buyer knows exactly what they are buying. This model suits sorted parcel returns containing recognisable products, such as electronics, kitchenware and toys.
When selling per box, you leave the parcels closed and sell the element of surprise. The buyer pays a fixed price per parcel or per bundle and only knows in advance the origin, the format and the product categories that may occur. This model suits sealed lots such as Amazon Shipping Bags (BP2), whose contents you do not know yourself either.
What a good listing for return goods contains
On a platform your advert competes with new products and with other second-hand sellers. A listing does not win on the lowest price alone, but on trust. Describe the condition as you find it: unopened, opened but unused, signs of use, incomplete, untested. State what is missing, even if it reduces the chance of a sale; a disappointed buyer costs more than a missed sale.
Use your own photos of the actual item, including damage. The same principle applies to mystery box adverts: show the sealed parcels as they are, name the origin and describe the product categories in general terms. Do not promise brands, a minimum value or quantities you cannot deliver.
- A title with the search terms a buyer types: brand, product type, model or size
- The condition in one clear term, followed by an explanation
- What is included and what is missing (cables, manual, packaging)
- Your own photos of the front, back and details, including defects
- Shipping costs and the option to collect clearly stated
- For mystery boxes: origin, format and the sentence that contents vary
Setting a sales price against the price of new
Buyers on platforms compare your price with the new price of the same item within seconds. Your room therefore lies between the new price and what a buyer is willing to pay for an opened, possibly incomplete item. The more honestly the condition is described, the less you have to drop to win trust.
Worked example: suppose you buy 100 kg of Parcel Returns Small/Mid at €6.00 per kilogram, so €600 excl. VAT and excl. freight. Suppose further — as an assumption, measure this on your own trial lot — that after sorting you are left with 80 sellable items. Your bare purchase price is then €7.50 per item. On top of that come sorting time, packaging materials, any platform fees and unsold items, so your average sales price must sit well above that amount.
Shipping costs and packaging: small and light wins online
With online sales, shipping costs weigh directly on your margin or on the attractiveness of your price. A light item that fits through the letterbox is simple and cheap to send; a heavy kitchen appliance quickly costs more to ship than a buyer is willing to add. So check per item whether shipping makes sense, or whether you are better off offering it for collection only.
This is also why small sealed parcels lend themselves well to online sale as mystery boxes: the format is uniform and light, so you can estimate the shipping cost per parcel accurately and build it into the price. Always state whether shipping is included in the price or charged separately, and pack sturdily; a damaged item almost always leads to a dispute.
Platform rules, buyer protection and disputes
Every platform applies its own terms for what you may offer and how. Adverts in which the contents are unknown in advance, such as mystery boxes, are not permitted everywhere or are subject to conditions, and those rules change regularly. So check the platform's current terms before you list, and contact the platform itself if in doubt.
Many platforms offer some form of buyer protection: if the buyer pays through the platform, they can generally open a dispute if the item does not match the description. An honest, detailed listing is your best defence. Keep photos, the advert text and the track-and-trace proof, and respond quickly and professionally to a complaint.
If you sell to consumers as a business, consumer rules generally apply, such as the right of withdrawal for distance sales, regardless of whether you sell per item or per box. How that works out for mystery boxes depends on the situation. Consult the guidance of the consumer authority (in the Netherlands the ACM) and have your terms reviewed by a lawyer.
When to sell per item and when per box?
The choice is not a matter of principle but a calculation per category. Selling per item generally yields more per item, but takes time: sorting, testing, photographing, describing, answering questions and shipping. Selling per box is faster and needs less space, but yields less per parcel and requires an audience that values the surprise.
Many resellers combine both. Recognisable items with a clear new price go per item; small, sealed or low-value parcels go as a box. Measure on your trial lot how many hours each model costs you and what it yields per hour, and decide on that basis per category rather than per lot.
- Per item: recognisable brand or model, testable, new price easy to find, you have the time
- Per box: sealed origin, small and light parcels, low value per piece, an audience that buys surprise
- Combination: pull out the valuable items, bundle the rest into boxes by theme or format
- Always: check the platform rules and describe the condition or origin honestly
Selling per item generally yields more per item but costs more time per item; sealed boxes sell faster but need an audience that values the surprise and a platform that allows it. Measure both models on a trial lot and choose per category, not per lot. Thinking about starting your own mystery box business? Get in touch — we are happy to help you find a suitable first lot.
Frequently asked questions
- Am I allowed to sell mystery boxes on Marktplaats or other platforms?
- That depends on the platform's terms, and those can change. Some platforms do not allow adverts with unknown contents, or only under conditions. Check the current rules before you list, describe the origin and format honestly, and contact the platform itself if in doubt.
- What do I do if a buyer opens a dispute about a returned item?
- Respond quickly and professionally, and back up your case with your advert text, photos and proof of shipment. Under buyer protection the platform generally assesses whether the item matches the description. A listing that honestly states the condition and missing parts prevents most disputes and stands stronger if one arises anyway.
- Is selling per item more profitable than selling mystery boxes?
- Per item usually yes, per hour not always. Selling per item takes time for sorting, photographing, describing and shipping; boxes sell faster at a lower price per parcel. Measure on a trial lot what both models yield per hour and choose the model that fits best per product category.