Not a chance in hell, IMHO. Put them all together with the other autographs they are offering and I'd say it's a mom and pop auction that should not be auctioning off autographs. The Mantle's are horrendous, but you already know that.
One fake two fake 3 fake, 1, not real...get it? 1 fake ALL fake. Don't try to put a square peg in a round hole is my opinion.