I've been through every edition of AD&D and never seen a phenomenom of this sort. Such a common book, by rights, should drop in value, not increase now that 4th edition is out.
I have the opposite experience here in California. Almost nothing but 4th Edition games. 3rd Edition really isn't more popular right now than a year ago. It's a lot less popular. But it seems that way on the surface because a certain group of people are being very vocal about how they're playing 3rd Edition and not 4th Edition. The majority of D&D players are just enjoying their new edition. You may have heard of this phenomenon as the vocal minority.The 3.5 core books initially fell in price with the release of 4e, and I picked up a new 3.5 Monster Manual & DMG last autumn at a good price, around £12 each. I had been running 3.5e with my 3.0 MM & DMG for years, but 4e renewed my interest in the game, and running a regular campaign I thought I should get the full set.
It's gone crazy now though. Prices are sky high. I think 4e may not have panned out for a lot of people. 3e seems more popular now than it was a year ago.
Edit: Last week at my D&D club, the only games running were 3.5 ones, which was tough for the new players who turned up looking for a 4e game.
I have the opposite experience here in California. Almost nothing but 4th Edition games. 3rd Edition really isn't more popular right now than a year ago. It's a lot less popular. But it seems that way on the surface because a certain group of people are being very vocal about how they're playing 3rd Edition and not 4th Edition. The majority of D&D players are just enjoying their new edition. You may have heard of this phenomenon as the vocal minority.
I have the opposite experience here in California. Almost nothing but 4th Edition games. 3rd Edition really isn't more popular right now than a year ago. It's a lot less popular. But it seems that way on the surface because a certain group of people are being very vocal about how they're playing 3rd Edition and not 4th Edition. The majority of D&D players are just enjoying their new edition. You may have heard of this phenomenon as the vocal minority.
I have the opposite experience here in California. Almost nothing but 4th Edition games. 3rd Edition really isn't more popular right now than a year ago. It's a lot less popular. But it seems that way on the surface because a certain group of people are being very vocal about how they're playing 3rd Edition and not 4th Edition. The majority of D&D players are just enjoying their new edition. You may have heard of this phenomenon as the vocal minority.