"Wrong Back" cards - What kind of value/demand?

I ran across some baseball error cards. I'm a football guy so I'm pretty much clueless as to whether or not these cards hold any value:
1988 Topps Basesball Traded
Mark Grace on the front / back shows 67T Billy Masse
David Wells on the front / back shows 4T Roberto Alomar
Robin Ventura on the front / back shows 43T Alfredo Griffin
Roberto Kelly on the front / back shows 8T Floyd Bannister
Roberto Alomar on the front / back shows 128T David Wells
Chris Sabo on the front / back shows 112T Jim Snyder
Tino Martinez on the front / back shows 27T Rick Cerone
Thanks in advance.
Brian
edited to correct grammatical error
1988 Topps Basesball Traded
Mark Grace on the front / back shows 67T Billy Masse
David Wells on the front / back shows 4T Roberto Alomar
Robin Ventura on the front / back shows 43T Alfredo Griffin
Roberto Kelly on the front / back shows 8T Floyd Bannister
Roberto Alomar on the front / back shows 128T David Wells
Chris Sabo on the front / back shows 112T Jim Snyder
Tino Martinez on the front / back shows 27T Rick Cerone
Thanks in advance.
Brian
edited to correct grammatical error
Collecting:
Dallas Cowboys
SuperBowl MVPs
Heisman Trophy Winers
Dallas Cowboys
SuperBowl MVPs
Heisman Trophy Winers
0
Comments
I`d pay a premium price for it,,,, but not the $1500 he`s asking
Lee
I would agree with metalmike in that wrong backs from the boom years are not hard to find. I can remember seeing ads in SCD for this stuff in quantity all the time.
Traded cards are a bit more odd though so interest might be a little higher.
Although I tend to lean towards miscuts and misprints I have a few wrong backs but don't actively seek them out as much as the other cards I collect.
Jeff
Miscut Museum
My Mess