The week I bought my first pin, I saw a Philadelphia collector's storage unit with an Alvin G USA Football and an A.G. Soccer-ball, amongst dozens of other pins he had in storage. He was not willing to sell either one (I bought his Swords of Fury and Stargate, though), but from that day onward I knew I had to have the major head to head pins.
Now that I have both, I have to say that although USA Football has a theme that seems more appealing to folks from the USA, A.G. Soccer-ball actually gets more play when I throw parties. It is more logical and easier to understand for non-pinheads (soccer theme of shooting goals is perfect for a head to head pin).
Just wanted to post this for those considering buying this pin. Honestly, if the price stays this low, I'm even considering bidding on it for my vacation home, so guys, please bid the auction up to keep me from having to do that!