You can check out the membership process and benefits by calling MBCA at 800-637-2360 or at their website:
www.mbca.org
Membership is $45 for one year and includes a six issue subscription to "The Star". In my opinion, the benefits of membership are enhanced if you have an active local section and attend their events. I have heard that some dealers offer a discount to MBCA members. Personally, I have never had a dealership offer me a discount, but I guess some do.