Marktkram is a marketplace for buying and selling
used stuff. Without fees.
As a buyer, you can place bids on items to haggle
about the prices.
Yet as a seller, you will always have full control over your prices. As long as the bids seem too low, you won't have to sell your items.
An item is sold when either a buyer buys it for the currently asked price, or the seller sells it to a bidder at the bidder's current bid.