Up for sale is a cylinder with piston removed from a 1984 KX250 that may fit other years. There are scuffs, scratches, stains, grease, dirt, oxidization, and light wear but it is in good shape overall and ready to install.  There are wear marks on the cylinder walls but no scratches other than some cross-hatching that is still visible and the piston is in good shape as well.  I recommend installing new rings and honing before installing.