Meh, for auction pics you don't need any processing. Get the color balance and lighting right when you take it and you're done. Check out the Strobist's lighting 101:
I think with digital people get so hung up on what they think they can fix in Photoshop that they don't focus on good lighting, etc. up front. Personally I've never seen a photo that looked better after lots of processing than it would have if it were taken correctly in the first place.