Not sure how it would play out in pricing, but....
If Obama (or any gun-hostile) pol is elected in 2012, then we have also to assume some part of the conservative 2010 gains will be lost as well. (I have heard Obama state he is opposed to semi-auto weapons, for example).
That's bad enough, but the wildcard becomes the Supreme Court. In a bad case scenario, 2 of the fab-4 retire or pass away. And this is not the worst case. Fair to assume in this case new justices will be gun-hostile as well, and it becomes 6-3 against 2A instead of 5-4 for.
Would such a court re-consider Heller? I speculate it's likely since the decision is still quite new (not really 'settled' yet), it was decided so narrowly, and those opposed were so rock solid in opposition. Don't count on stare decisis to keep Heller safe either - it ain't law, just convention. They can override anytime they want. And the more idiotic high-profile gun crimes we have, the more likely.
Get in the game. Vote. Get your friends to vote. Work for your candidates.