I've been dealing vintage guitars for over 30 years, ran Guitar Trader in the late 1970s through 1987. We mostly sell "true vintage" investment grade prewar guitars and solidbody electrics from the mid 1930s through the Beatle era.
Personal checks are very welcome, they clear my bank in less than 2 days, I almost alway ship the second day. Bank checks are fine, but they seem to take the same time to clear. Paypal, but on items over $1500 you pay a %.
Fed Express overnight on anything over $5000, Fed Ex ground on all else unless you request UPS.
72 hour approval, no questions ask return policy, if your not happy, we're not happy.