'71 Thermoquad -- 4972S or 4973S
I've paid between $200 and $300 for them. A molested one is a parts carb to me anywhere from $10 to up to $150 or so depending on what part is missing or cracked or frozen etc. Rebuild mean nothing unless it comes with paperwork that it was rebuilt by Harms, Carburetor shop, Quickfuel, etc.. these shops can ultrasound clean them, mill if warped, rebush shafts, properly retap idle air screws, adjust butterfly to bore if needed, and i know Harms runs and adjusts each carb he does on a test engine. Check Ebay completed auctions for a idea.