Question RE:1954 Bowman Variations
 

Can anyone fill me in on the 1954 Bowman Variation cards. I watched a bunch the other night on Flee Bay and saw examples of PSA 7 & 8's sell for as much as $800? Are the variations that tougher than others?

http://cgi.ebay.com/1954-BOWMAN-140-...item2c54cbf836