I have two ZeroStart battery warmers for sale. Model # 280-0063, 80W, 120V, 36" long for most car/truck batteries. I bought these a couple years ago for my older batteries. Were both installed and then removed before the next winter. Decided to go a different route with trickle chargers.
I believe you can get these online right now for $53 each on autopartsandstuff.com. I would let them go for $40 each or $70 for both. I don't see having a use for them and would like to pass them on to someone who could use them.
Message me here on BisMan if interested and thanks for looking.