Yeah I understand that perspective, and it looks like many others share it. I should also mention that I have since parted with this 1988 Gibson SG '62 prehistoric reissue, though I think the topic is still relevant.
The less common reissues, limited editions, custom shops are probably good collector items when they're in original, exceptional condition. They've already been going up in price over the last 20-30 years, but is it the guitar or inflation? Not sure.
For me making mods goes hand in hand with buying any guitar because it's all about the playability ... neck profile and overall feel. Everything else such as pickups are secondary. I just like the feel of vintage guitars and know I'll need to swap pickups to get the sound I want.
Thanks for the comments.