And it's probably only going to get worse as more info about the movie is released. I have around 10-15 books left to upgrade and I'd ideally like to get them before the prices become too crazy.
I'm starting to wonder if I should shift my focus to another title and wait until AFTER the movie has been released. If it's another Daredevil dud, perhaps prices will plummet again and it'll be a buyer's market.
I can see your logic and it's sound logic. Trouble is, if the film is a success, the prices will probably stay on a higher tier.
The modern comics can either help raise or impede prices to a lesser degree. I predict that Brubaker will bring back Cap at some point (after all, he will be back in time for the film) and knowing Brubaker, he'll do it well. Also someone (and I hope it's not Bendis) will bring back more of a traditional Avengers book before that film, I think.
Anyway, I digressed a bit then but my point is that it can go either way at this early stage. The Iron Man success has put a lot of the fanbase and critics in a good frame of mind to receive an Avengers film but it's a long time between now and then and a couple of stinkers between now and then could easily kill the momentum.
So in conclusion, I have no idea, what is the best buying strategy.