As recent as last year the developers were not giving any co-op commission to any realtors. Now pretty much every broker is. The commission ranges from 3-4%. What you want to do is work with a Realtor who will credit you with a portion of that commission. Of course your Realtor will also negotiate down the price, as well as raising allowances for you. In todays market you should be able to obtain a landscape allowance. Finally you will have a real estate professional who will be able to review all of the documents with you, rather then just the salesperson.