For the smaller budget (like mine) sportlots is much better for buying because of the more reasonable shipping rates, but you also need to keep in mind it is up to the seller on how they ship. Translation you will get a lot of PWEs from sportlots sellers. For many of the 1,2,3 auctions I enter there I don't mind much but I did get PO'd from an Ebay seller that sent in an PWE. (My official rant is in my
CaptKirk42's Collection thread (post #58 if the link is hokey)
At one point I was thinking of trying my hand at selling at sportlots but right now my collection, and cards I would sell are way too disorganized (plus I don't have my printer hooked up at home to print out the invoices/orders). Even though I don't sell a whole heck of a lot at COMC (one card like every 4-6 months or so) and don't have much of anything spectacular there. It would probably be better for me to add more cards there (at COMC). From a selling point the great thing is they have the stock so you don't have to worry about how to ship stuff.