Nice cards YVol. I do a little card collecting myself. I only get UT rookie cards. Got a number of Manning autographed cards and at least one UT rookie since the late 80's. Did you get yours graded or buy them graded? I remember when the grading craze was going on about 10 years ago and everyone in the world was trying to get in on the act. I always liked PSA and Beckett the best.
I hate it when players only sign their initials. I got an Eric Berry one before he went to just EB. Meachem's has always been weak. Manning's is always almost written out fully. That is rare since he signs so many things. I display some, but any kind of light will fade them out over time. I've got a Manning signed Colts helmet signed in blue that is probably 50% faded. Got it back in '98. Black is the best. I like orange on the helmets, but it fades too.
I like to look at high dollar cards in person before I buy, but it's hard to beat the prices on ebay. The internet has helped everyone's collection, but hurt their wallet.