[h2oya311]

If you are throwing that kind of money around for cards, I recommend vintagecardprices.com . It gives prior price on each card at each grade level sold at any major auctions (including eBay). Just make sure to take each price (particularly w/ OJs and low pop cards) w/ a grain of salt and understand the context of the sale to get a fair price.

This is probably going to help you out a ton in the long run, esp. If you are in the OJ collecting business. Also, for OJs, remember that the image quality often supersedes any numerical grades assigned by the TPGs. A poor contrast pink tint SGC 60 will sometimes sell for less than a clear image SGC 10 w/ back damage.