As a general rule, what kind of value do game used bases have? I am looking at a Cal Ripken autographed game used base from Yankee stadium Cal's final appearance there on 9/30/01. It comes with the ironclad hologram and is signed and dated by Cal 9/30/01. This is the limited edition base with the giant 8 on top and cals #8 on 2 sides and the mlb logo and yankee logo on the other two sides. The base shows lots of game use and comes in a framed case. Wondering if anyone has any opinions on what this item might normally cost ballpark range, no pun intended. Would this also be more valuable than a similar game used base from Oriole park from 9/1/01 signed by cal and inscribed with 3170 hits because he hit his 3170th hit in this game? Any feedback would be helpful.

Thanks
Brett