Manufacturer refurbished, seller refurbished, open box and liquidation are four different purchases.
Manufacturer refurbished means the maker inspected, repaired and warranted the unit. Retailer refurbished means the retailer did. Seller refurbished on a marketplace means whatever that individual seller says it means. Liquidation and pawn inventory means the unit was acquired in bulk and is being resold with whatever recourse the seller chooses to offer, which is sometimes none.
All four appear in price comparisons below the price of new stock. Only some of them come with anyone standing behind the unit after it arrives.
A comparison engine ordered purely by price puts resale inventory above new stock by default, because resale inventory is cheaper by definition. That is not a comparison. It is a category error presented as a saving.
We now classify every offer as retail, marketplace or resale before ranking, and new stock ranks above resale regardless of price. The classification is shown on the listing rather than implied, so a lower number never quietly stands in for a different kind of purchase.
The classification decision is made in one place on the server and read everywhere else. When we first wrote the client-side version it failed open, meaning an unrecognised category would have been treated as new stock. That is the wrong direction to fail, and it now costs an unrecognised listing its rank rather than costing a shopper.
In our August 2026 audit, a Roomba J7 search returned a listing described as a barebones unit, bricked, sold for board repair. It was priced below every working unit in the results and it carried the correct model number. A second listing in the same search was a side brush motor at 14.95 dollars.
Listings sold for parts are legitimate inventory and someone genuinely wants them. They are only a problem when they are ranked against working products without being labelled, which is exactly what a price-ordered list does.
Open box usually means returned and repackaged, often unused, typically with the full warranty. Refurbished means something was repaired or reconditioned, and the important question is by whom. Pre-owned means used, with an unstated history. For parts means it does not work.
The words are not standardised across platforms, which is why the seller matters more than the label. The same phrase carries a manufacturer warranty in one place and nothing at all in another.
Manufacturer-refurbished stock with a real warranty and a return window frequently is the better purchase, particularly for a product line that has changed little between generations. Certified programmes from major manufacturers often replace the battery and the outer casing, which for a laptop or a phone is most of what wears.
The test is whether you can name who honours the warranty, for how long, and what happens if the unit fails in week three. If those questions have no clear answer on the listing, the discount is not a discount. It is a risk transfer, and you are the one accepting it.