I am not going to say that any ONE site is worthwhile. It is a combination of several - they work for me. This does not mean they will work for other items, therefore it is pointless me recommending them. You have to try them and see - I did my ground work to find out - I suggest you try them too. Most of the larger auctions sites are listed on the powersellers unite board. There are also many sites attached to peoples signatures in auction forums (not ebid forums tho).
Most of the sites have a bulk lister, which is a necessity for me as I have several thousand items listed on each site.