Are you making an auction Website out of those domain names? If not, I highly doubt anyone will pay much for it. Just think to yourself, can anyone use it for their benefit?
If I were to start an online auction business, I would go for a brandable and short domain name. It could be anything that appeals to you, like ubid, ebay, and etc... Those are brandable domain names, which is used to start a business. They have no traffic at the beginning. Therefore, it would need to be built upon it.
However, if you're domain has traffic and pertains to auctions then you could sell it to the auction businesses. They'll make use of the traffic by directing it to their Website.