the challenge in today's market also is timing, sales go quick. personally, looking for used, a conversation with the previous owner can reveal a lot if no records. & i would hire an impartial tractor mechanic to check it over.
i know, by then the machine may already be snatched up.
being of advanced age & retired w/equip, i feel very fortunate. i do worry about our next generation tho, they have a hard path ahead given current economy, climate, & other (notice i didn't use the P word)
best of luck to OP on the sale.