Well - when I started out on electric guitars in the early 80'ties the 70'ties area of Fender Stratocasters were the laughing stock of the time. Heavy, bad QC etc. No one wanted them and you could pick them up for cheap. Now they are "vintage" and the prices are going up, up, up. And a lot of players now think they are good quality ... funny eh?
Those 2015 Gibson will be rare (they already are) and collectable down the line as well.
Also not true-
70s/80s Gibsons and Fenders are not in the same ballpark or universe as the 50s/60s.
The prices may be going up imaginary- but a typical 70's/80's Les Paul goes for LESS than a 90's 2000's one on the used market.
They may have high price tags but people aren't actually getting those big numbers for them
The problem is- people think "oh well 50's 60's are worth soooo much- my 70's/80's is beat up and old too and it must be worth a ton!"
There's some cool fenders even from the 60's- like mustangs/jagars/etc- that don't go for a great deal of money- $800-1500- when a new Kurt Cobain Mustang is $2000+
So people put big price tags on the 70's/80's stuff- but a lot know the quality issues, and whatever- and they don't actually sell for much money at all.
I pass them up, even the customs all day- they're out there...
Rarity- there's 18 1958 Gibson Explorers, maybe 1 2 or ZERO original Gibson Moderns - that's rare
from 1970-1989 there has been a TON of Fenders/Gibsons.
I can't imagine many 70s 80s Fender's being worth over $2000- maybe ever-
And on the Gibson- they're all over the place-
90's Ibanez guitars will hit $5000 used before 70-80 Gibsons