Questions On These Neymar Autographs???

http://www.amazon.com/Powers-Collect...=neymar+signed

http://www.ebay.com/itm/Neymar-Brasi...item43b577d9ff

do these look like credible sources?
there are a bunch of ones for like 30 bucks on ebay, while there is one on soccer.com selling for 500 bucks.......then again I havent heard of fake autographs on amazon...lmk if i should avoid these alltogether or what because im wary of spending 140 on one of this let alone 500

Personally I would stay away from any autographs that do not have reputable sources backing them. His autograph is not necessarily hard to fake. They offer certificates of authenticity from themselves which doesn't makek them reputable at all.