I do hope this game stays in the Top 10 for a good long while. 6 months would be great! If they can net around $10 million that would be a huge step in favor of old-school games rules rather than the predigested swill that most RPGs are these days. Oops, my bias is showing.

However, I am one of those people that is waiting for a bit of a price drop. I have a good friend and we are itching to get into another good co-op game for our weekly gaming sessions, but $80 USD is a bit much. That's the price of Steam Digital Collectors Edition + another Source Hunter DLC (so both of us have access to the DLC). I personally dislike DLC. It almost never gets the same level of reviews and critics that the core game gets and that to me just feels wrong that the developer is 'gaming' the system to get more money. To be fair, I'll do a bit more research before I make a final determination. Yes I know I can buy the normal game sans DLC, but if I get 2 copies then I am losing out on a $20 savings, the DLC, and the soundtrack (I'd enjoy that bit).
That and waiting a bit for the devs to patch the game so saving is not so problematic. I have a 64-bit machine but my friend is running a 32 bit version of windows (where the problem tends to show up).