D&D General Should I buy any old Ravenloft books?

[Whizbang Dustyboots]

Van Richten's Guides would be my suggestion, most of which have some interesting ideas that can easily be adapted to your game of choice.

 

[jian]

The question for me is: did anyone buy and use Masque of the Red Death back in the day, and how was it?

 

[Tinker Gnome]

The question for me is: did anyone buy and use Masque of the Red Death back in the day, and how was it?

Not back in the day, but it is AMAZING. Though I would probably still tweak the spellcasting rules if I ever ran a AD&D 2E game using it.