About $60 to $94 as of 2026-11-06, based on 4 recent eBay sales with a median of $75.
Recent eBay sales: $100 (Vintage 1930's Stanley No 4 Type 16 Smooth Hand Plane Sweetheart Blade); $100 (Stanley Sweetheart No 4 Smoothing Bench Hand Plane (12-136) - Made in…); $50 (Stanley SW No 4 Type 19 Smoothing Hand Plane - Vintage Old Antique…); $35 (Vtge Stanley Bailey SW No. 4, Type 13 “Sweetheart” Smooth Sole , Pat.…).
A maker's mark, signature or label is the biggest single thing that moves the price. Photograph it close up. Condition: chips, cracks, repairs and missing parts lower the price; original finish raises it. Size and form matter. A miniature or a tabletop version of something is a different market from the full-size piece.
Snap 2–4 photos and Guestimator prices yours from what's selling now, then lists it on your own eBay account. You check every word first.
Guestimate mineGuestimates are market estimates from public eBay data at the date shown, not certified appraisals. Prices change; check before you buy or sell. As an eBay Partner, Guestimator may be paid a commission when you buy through links on this page.