Did a quick check, it's probably around $30 average for a mint kiprusoff Mcfarlane action figure on ebay. Don't worry about kicking yourself for popping one of two out of the package and letting your kid play with them as far as I know.
http://www.ebay.ca/sch/sis.html?_nkw...d=331143721340
No idea on the base ball stuff, but I wouldn't be surprised if it is worth more due to the difference in market in the USA.