FSBO Need access to RLS

We are currently marketing our condo as a FSBO listing. We even expressed in our ads and directly to brokers that we are willing to pay a 3% commission (typically the max they get on a co-broke). However, they won't touch us and in fact we've heard some dissuade their buyers about our property even though their buyers have expressed interest. We would like to legitimize this by using REBNY's RLS system. However, we don't have access. We want to avoid doing an exlusive listing because saving 2-3%(ie. paying a total of 5-6%) gives us more negotiation room on our offer price.