Like Roy A, we need to see pictures before "ball parking" a price. The serial number is a must. I have sold four, two cloned units for $2500 each to collectors (yes, they knew they were reproductions), the highest priced D-165 for $5000. Their value has dropped significantly since it's a fairly simple matter to replicate the machine if you are patient. 24" Cleveland Welding frames appear on eBay from time-to-time. Some front fork parts require fabrication easily done by a machine shop.
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