I think a few economic principles are being mixed together. Clothes, like any product, will have a significant spread in price. You have to take into account a number of issues including age, condition, and size, to name only a few. The overwhelming majority of secondhand clothes depreciate over time, the exceptions being pieces that are valued for their age, designer, or material. However, across all of this, you can come to an average price for what a piece sells. Since you're asking which price sellers should use, I can say that the smart seller takes a close look at their item and compares it to those that have sold across the spectrum. Maybe the seller has a rare size that doesn't often appear on ebay and can therefore ask a higher-than-average price. Maybe there is a surplus of larger sized suits on ebay and he has to ask for a bit less. Either way, he has to analyze the market and compare it to what he has in his hands. Therefore, you (buyers and sellers) should take the higher-priced, slower selling item AND the lower-priced, quick selling item into consideration. It's all a part of the average. When it comes to high-priced, slow selling/low-priced, quick selling items, you can see market-value in action. Why is the low-priced item selling fast? Simple, it's being priced below market value and the customer base sees. As a result, it sells quickly. The other side is true. Someone is pricing themselves above market value and it is taking longer to sell. The same is also true for a buyer. If the buyer is a smaller size and most of the listings are of a larger size, the buyer can expect to pay a premium for his size and therefore can't compare it to the prices paid for larger sizes. Again, it's important to look beyond price as the only restriction. Are we assuming these suits are identical in every way (size, color, condition, etc.)? If that is the case, it's easy to understand why the higher priced item sits longer on the shelf. We can get further into it and say that some sellers on ebay, as in real life, have a certain reputation. Seller ABC may have a long history and loyal customers that appreciate his service and have built a relationship. People may be willing to pay a bit more with seller ABC because they trust them. Low-balling is only relative to the item in question. Low-balling, by definition, is offering significantly lower than market value. It's used as a sales technique in order to convince the seller that their item is worth less and therefore feel much better about selling it at a discount. For example: I'm offering a product for $100 and a potential buyer offers me $20, 80% off of my asking price. I say no, it's worth far more than that and they raise their offer to $50. Suddenly, the buyer has offered 2.5 times their original offer and the seller now feels as though they're making a much better deal. Finally, yes, some sellers inflate the price of their goods. Ebay has thousands of sellers, many of whom don't put a lot of thought into pricing/business models, etc.