It's okay to sell anything, just let the buyer know what they're getting. I get most of my saws used so I can't tell them what the previous owner did to it unless he tells me..This is a bit like when I hear someone has bought a second hand car for a price that makes them think they have ripped the seller off, then they find the odometer has been wound and it's them that has been ripped off. A good deal should be where both partys are happy, and honesty is dealt on both sides.
If you genuinely thought or were told you were buying a genuine saw in that condition for that price and you thought it was fair, then you were ripped off, but if you thought you were getting more than you were paying for then that is something to consider as well. Did the seller intend to rip you off by miss representing the saw?
I would much rather build a saw like that from crushed or broken bits and have a part original saw than buy one done by someone I don't know, but I would never sell a frankensaw to Anyone else.
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