DBN

Hi, I've found a stockpile of untouched and sealed Warhammer Fantasy and Warhammer 40k boxes. They are approx. between 15 and 20 years old. Stuff like the Battle for Macragge Starter Box. So that's 4th edition. I'm contemplating whether I should buy the bulk. I think it is close a 100 boxes. It's to much for me, so I'll need to resell it. I've been out of the hobby for ages. Mainly use my miniatures to play mordheim sometimes, or D&D encounters. I could use some help. Where do I start?