I think the Mantle is a 6, and the Yaz is a 6.5. So my opinion is right in the middle of what the seller and buyer are thinking. They both are nice looking cards and the flaws are not that major. However I would take a fine ruler and measure the cards compared to commons from those sets (or just bring some other cards from those sets, if you have any to compare them to). The centering on both cards is really good, and that always concerns me, as I know it was common at one time for people to trim the cards to make them look more centered.
Collecting John Stockton, Karl Malone, Ivan Rodriguez, Gary Carter & UF player rookie year cards. Plus Jedd Gyorko rookie and prospect cards.
Jedd Gyorko 2010-2013: Have 329/419 including 1/1s
Wantlist: http://sites.google.com/site/sportscardsite/set-needs/
Jedd Gyorko 2010-2013: Have 329/419 including 1/1s
Wantlist: http://sites.google.com/site/sportscardsite/set-needs/