Re: Vintage guitars...
I dunno...I mean read through books and forums and there's definite some moments in guitar history when things aren't all that worthy, yet they aren't dirt cheap by any means.
For example, the last Fender Stratocasters done with 4 bolt neck joints and old style truss rod adjustment were made in 1971, and in that same year 3 bolt, micro tilt, and bullet rods were implemented. So you could say that from that year on Fenders stopped being worth that much yet you see '72 Tele Deluxes going for brand new Gibson CS Historic reissue prices, even if they have bullet proof poly finishes and other undesirables. Is it the Wide Range pickups? or is because people just like old stuff? Some will say that as soon as CBS bought Fender (63-64 if I'm not wrong, please correct me) their value went south. Yet I see mid and late sixties Strats going for 14-20k on Gruhn's website.
Same with Norlin era Gibson. People talk about how crappy the pancake bodies and necks with maple necks with volutes were, yet some consider them to be the end all, be all hard rock guitar, and while they don't command the same price as a '59 Burst, they cost the same as a good midrange modern day guitar from what I've seen. Of course a big part is the nostalgia because during that time some of what a lot of people consider to be the best rock n' roll music was done in that era, and done with those instruments.
What gives? Well people like their guitars with some years behind them I guess. So anything with some age might be worth it in the future. In fact, thousands of years (I hope it never happens) in the future maybe if all wood sources becomes extinct who knows maybe a cheap Indonesian Squier will be worth tons of whatever currency is used! They will be considered antiques! I certainly pray (I never pray but I do pray for this) that that never happens (I mean the wood sources part not the Squier part).