The Mark IV — the four-mode Mark that carried the line through the 1990s.
Marks that can be entered for this maker: Serial number (plate), Transformer code, Born-on / QA sticker.
Nothing predates 1990; components only push the date later.
Sold-listing reading: fair $2,466, good $3,625, excellent $3,634 USD · 7 sold listings (thin sample — indicative only) · as of 2026-10-15. the Mark IV trades in a tight 2467-4562 USD band across Rev A / Rev B / short-head / long-headshell / hardwood (Imbuya) versions, and the three condition tiers land within 1200 USD of each other (fair 2467 / good 3634 / excellent 3625) - for this model the wood and revision matter more than the condition label, exactly as with the Marshall 2203. Excluded: a 'Mark IV combo housing hardwood & wicker' shell (470 USD), an Electro-Voice EVM12L loose speaker (353 USD), a 'Mark IV EVM12L Speaker' listing (221 USD - reads as the speaker, not the amp) and a Simul-Satellite head (1569 USD, a different Mesa product). Alignment on this page was verified: PRICE DROP markers sit at the same four positions (4/5/8/10) in both the price and the condition arrays. Reverb exposes the price and condition but not the exact sale date, so asof = measurement date; no Fair/Poor sale observed; fair = lowest sold price in sample Condition tiers normalised to monotonic order (the source sample had a condition tier below the lower one).
Evidence: Blue Book of Guitar Values — mesa boogie · reverb.com