Posted By:
RobLeon, I haven't heard of most of those cards you mentioned 
1) 1909 M101-2 Cobb
2) T206 Keeler (just got, "nicest" of the very few t206 i have)
3) 1953 Bowman Pee Wee Reese
4) the single Old Judge N172 card I own, in poor condition
5) a single card of Mattingly, and a few random cards given to me by family members for sentimental value only.
Rob