Originally Posted by Tim Brice
At one point does a card become rare? I have a Brett Favre card made in 96 that only 250 of them were made.
As the previous response indicated, normally even these limited number cards do not have much value. The simple reason is that other than the numbering there isn't anything special about the card and for a player like Favre there are hundreds of other numbered cards from other sets out there. Plus, if unopened boxes of those cards are still available, then inserts from that set will be worth less money. And couple that with the internet providing an easy outlet to find the other 249, and there end up being very little value.
All this having been said, late 90s basketball inserts have seen a big increase in value of late, so it's not out of the question that football will go up as well. It's because the boxes are getting much harder to find and many of these numbered cards are already accounted for in someone's collection.
If you want to try to sell it, find out the value and put it on eBay with an outrageously high BIN. If someone buys it, great. If not, you're not out much money.