i mean, what's your time worth? plus 50~60 in materials.
i'm not trying to throw shade on your ability, but unless they're perfect i don't see north of $250 so that would entail an absolute keen spray job, repairing/replacing the fubar'd fin and gacked up pipe.
people buy these because they want them correct; so then, iffin it's anything less than dead on balls accurate that equates to less dinero. usually much less.
personally i'd put them up at a buck-fiddy and let 'em be somebody else's passion project.