Operating since 1985, Mark's Guitar Exchange in Point Loma is an authorized Martin dealer on Midway Drive in the Midway District San Diego, with a second location in Chula Vista. The luthier bench carries a combined 50 years of fretwork, setup, and structural-repair experience, turning around neck resets and refrets on a timeline tight enough to keep gigging students enrolled at School of Rock stage-ready between recitals. Electric and acoustic inventory spans entry-level student models through collector-grade vintage pieces, with D'Addario and GHS string stock filling the accessory wall. In-house lessons cover beginner chord charts through advanced fingerpicking technique across private and group formats. The Midway District showroom's repair-plus-retail model — selling the instrument, then servicing it for the life of the player — overlaps with the lesson-and-sales approach at Songbirds Music on the peninsula. Full acoustic-top replacements and vintage-pickup rewiring jobs represent the shop's most labor-intensive repair commissions.