I understand that very well.
Personally, I'm not the type to spend full price on games. That's why I usually don't pick them up until they've dropped in price.
In the case of TR: Underworld, however, I found it for only £25. That's really good if you consider the current exchange rate of the pound vs. the euro.
It's on Amazon right now for £17.98....I am tempted, but I still haven't finished Legend or Anniversary yet, so I'll probably wait. Demo was ok though; shame about the combat system and apparent lack of enemy AI.
For the record, I'm a newcomer to the franchise. Played the TR1 demo back in the PS1 days, but never got around to getting the ful game (too busy with MGS & my N64.) From what I read in later reviews the sequels were getting progressivly worse, so I never bothered trying any of them either. It wasn't until a few months ago that I tried the TRA demo on Steam that I got into it an bought both of the newer games from the bargin bins. Even bought a joypad for the PC especially for them (that and my old Snes & megadrive emulators