#1
What to look for specifically? Tips? How do I value a vintage acoustic guitar?
"ba doo doo ba doo doo ba doo daa"
- earth,wind, and fire
Last edited by hecks at Mar 6, 2017,
#2
hecks 
It depends on your purposes, why you want to buy vintage one. I think that key points of buying a vintage acoustic are condition, age, originality, and rarity. You can check these comprehensive guides: ebay guide, reverb guide.