Dear Arthur:

As stated in the previous answers this means "Or Best Offer."

I see that you are looking to both buy and sell a home in Brooklyn. If you have any other questions or if I can be of any assistance, please contact me.

You can also visit my "Brooklyn Real Estate Blog" for tons of useful buying and selling information at the following link... http://tiny.cc/mzaVG

Good luck!

Mitchell Feldman
Associate Broker
Madison Estates & Properties, Inc.
Office: (718) 645-1665
Email: MitchellSFeldman@aol.com

Arthur,

This normally appears with the current "asking price" and is intended to encourage interested parties to make an offer......meaning "or best offer."

You will see this term mostly on sites selling cars or small items, but it simply means:
Or Best Offer.
Make them an offer!