We are licensed here in MD but that does not give us access to the Lockbox system. I have joined the small board in my county and now have a Sentrilock key (I had a Supra key before we switched systems). In total it costs me less than $500 a year. I get to network with Realtors for more business - never a bad idea in my view. Networking with Realtors does not mean you are their puppet and cannot perform your service objectively. I personally very much like having the lockbox access, for many reasons, including that I am compulsively early and will get a head start if appropriate, or for picking up radon testing equipment.