There are so many Sports Memorabilia places to shop at on-line that it is difficult to choose the best place.   I think that they are pretty fair and are about the same.  The main thing that I look for is  that I always  make sure that there is a phone number and physical location attached the business I am shopping at.  I will never buy from a place that only allows emailed correspondence.

BidAMI.com Sports Memorabilia Auction and Sales is a great website and has been around for over 20 years.  They have a physical location and phone number.  Someone is always around to answer any questions and here is there number 888-308-9714.    Check out some of there items.  They are always listing new items in their store and auctions.  I have gotten some great deals