The ubiquitous vintage Teisco might be the cheapest vintage guitar you can get, and I think it offers a lot of charm. It's light, stays in tune annd has cool pickups. Since there's not a lot of sustain, you get a plinky sound that is very usable in ambient and experimental music. Or crank up the fuzz, it's the punkiest guitar you can get. I've never seen an other one in this very pretty sparkling blue.
Condition: good for it's age, with some scratches and play wear. The top layer of the pickguard shows some lacquer damage. Fully functional