I don't know if this is any help to you, but here is a G-75 on the Boston Craigslist for $1,250:
Guild G75 acoustic guitar - musical instruments - by owner - sale
Very rare Guild guitar with original case. Made in 1975 in Westerly, RI, this is a dreadnought...boston.craigslist.org
The G75 (in Acton, MA) is fairly near me. If you want some help, PM me and we'll work something out.
Glenn
There are two threads about this guitar running concurrently -- maybe combine 'em moderators?
"Hey Mikey" (on the other thread) is going to check out the guitar today and get back to us with his impression.
(Yes, I'm in Boston -- Cambridge, to be accurate.)
Glenn