If it's some mid level player the COA doesn't really matter to me as why fake a 5-10 piece.... and if I get duped I'll live with it. I wouldn't touch any spendy HOF pieces without one of the big 5 having authenticated it PSA, JSA, SGC, Steiner, field of dreams.... probably missed a few more trusted ones. Well over half of all that EBAY stuff by Jo Blow COAs is fake on the Bay.. some isn't, but not worth the risk in my opinion
What if your family tries to sell it when you croke or you need money........ every tom dick and harry are going to question the authenticity of a high end piece with a jo blow COA
http://s51.photobucket.com/albums/f385/twins2008nathan/