Get the Tone
Joan Baez played a Martin 0-40 from 1880, which she acquired in a guitar trade in 1966 until she returned it to its owner in 1968. She replaced this with a spectacular 20s Martin 0-45 ($250 in 1963). Good luck finding either of those. You stand a slightly better chance of unearthing one of the Joan Baez 0-45s that were released in 1997, but in truth any small-bodied guitar will supply the desired crispness and clarity.