Comparison: Ortiz vs Ramirez

I don't understand why David Ortiz's 97 Fleer & Ultra RC's are booking for $30, while Manny Ramirez's 92 Bowman RC is only at $25? Manny is 33 y.o. and has 446 HR, 1972 Hits & a .314 BA, while Ortiz is 30 y.o. with 191 HR, 926 Hits & a .282 BA. It's all because of one good year (last year) when Ortiz hit 47 HR, 148 RBI & .300 BA (and his postseason performance) (even though Manny hit 45 HR, 144 RBI & .292 BA that same year, in the same lineup). If you look at their ages & career accomplishments thus far, Manny's top RC is a bargain (and a keeper). Yes, I know that Manny has had some bad press about wanting to be traded, etc..., but he is a future 500 HR club member and pretty probably a future HOF'er.