There’s trouble brewing for those of you that count on eBay for all or part of your income. The Internet auction site has just signed a deal with Buy.com, which will allow the latter to sell products on eBay at a fixed price.

The New York Times reports that the deal between eBay and Buy.com is eBay’s answer to the rise in popularity of online stores like Amazon and what seems to be a drop in online auctioning.

Larger sellers are able to offer perks alongside their auctions, like free shipping or the like. These are deals, which smaller sellers can’t afford to offer without taking a fall financially. The deal with Buy.com has many of these small sellers up in arms but that’s not to say it’s good news for bigger sellers either.

Big sellers pay thousands of dollars in listing fees every month and the NYT speculates that considering the volume of listings from the company, Buy.com isn’t being subjected to these fees. Several Power Sellers voiced concerns to Ecommerce-Guide.com at eBay Live 2008 with one anonymous seller saying the deal was unfair to sellers.

"They’re flooding the market, they’re not paying thousands of dollars in fees each month like the rest of us (Power Sellers), and so there’s no level playing field. And the whole thing, the way we found out about it, it’s this secret deal. It’s just so unfair."

The change is one of several eBay has implemented since it named John Donahoe as its new Chief and is said to have added 5 million listings to eBay. Details of the deal have yet to be announced.