Signed rookie question

Fatty98

Newbie here...wondering how much a signed rookie for the following would go for on eBay. Any feedback would be greatly appreciated.

84T Eric Dickerson
89 Score Barry Sanders
80T Rickey Henderson

Am wondering how much PSA/DNA adds to their values. (for example, if a signed Dickerson rookie is worth $30, with PSA/DNA is it worth $50?

Thanks for any help.

thenavarro

If you want to sell the Dickerson for $30 delivered and if the card is Nr. Mt or better and the auto is nice, I'll buy it. Please send scan if you are interested to navarro@flash.net or PM here.

Mike