current 2019 value of a mark levinson 9


neighbor has offered to sell me his ml9 what should i offer.
firstbible
You mean to be cordial? Or do you actually really want a Mark Levinson?
He is selling his house and has some stereo items to sell I assume it is a good piece.
If you're asking about a Mark Levinson ML9 amplifier, the Audiogon Bluebook lists the average as $1100...You're welcome!