Hey Sport,
Don't do it.
Don't do it until you ask around, read enough info on pricing, call enough shops, and get all the advice you can.
But
do nothing until you know exactly how much this card is worth.
You'll regret letting it go, especially if you find out it was worth 10 times what you "gave" it away for. Get a Beckett price guide online and do a search. A Nolan Ryan Rookie must be worth a whole lot.
It
is a Nolan Ryan Rookie for cryin' out loud!
Best of luck to you,
lylcoop