I am looking for a 4x5 enlarger, and I am talking to this guy who has Berkley omega and he wanted me to give him an offer, i dont know how much is this exactly in the used market today.any advice about the price and about this enlarger?

below is the email i receive from him...

"4x5 Berkey Omega Universal Prolab condensor type head. The support is from another enlarger I used to own, but fully compatible with the head. The old enlarger was also an Omega dichroic diffusion type head. Does only black and white, but works fine. There are 2 lenses: 1 5.6 135 mm and a 5.6 150 mm., both Kreunach componen-S."