I'd like to suggest being able to use 2 catagories in the coins category. I have a coin which is a shilling (which obviously has a category) but it's also a hammered shilling, before 1660. At the moment i can only use one or the other, but being able to list in the both would highligh the coin more i assume
Also maybe a watch list (the number of people who might be watching your auctions)
Regards
Billyscoins