Almost any agent will be happy to list your co-op for sale. I suggest you interview three or four agents from different companies and see what each has to offer. I wouldn't just go by commission as some agents do little to no paid marketing. Ask each agent what their commission is, if they are a full tiem or part time agent, what their marketing plan is, and if they wil offer you a written guarantee that you may cancel the listing if you are unhappy with their services. Good luck.
Tom Brady SFR, e-PRO, SRES, GREEN, BPOR
Licensed Real Estate Salesperson
Notary Public, Retired N.Y.P.D. Lt.
#1 Listing & Selling Brokerage in NY
Charles Rutenberg Realty, Inc.
255 Executive Drive - Suite 104
Plainview, New York 11803