[frisco]

I don't think that's true. eBay is ridiculously overpriced compared to DoveBid. I've gotten things on DoveBid that would have been 10x more expensive on eBay. Also DoveBid provides other services, holding inventory and operating warehouses (whose operators you can befriend and get them to tip you off to upcoming sales of things you're looking for, or help with logistics).

eBay is a shiny end-user-friendly auction interface; industrial used equipment markets are way more complicated than that, and DoveBid/Equipnet offer a lot more depth when you get into them.