MC Summer School vs. Community College

I know a lot of people including myself have thought about taking one or two courses during the summer to possibly get ahead. I am staying on campus over the summer and had planned on taking courses here at MC for somewhere around $270 per credit hour. Of course I thought this amount was crazy, but I was just going to deal with it. However, I heard that the community college in Marietta (Washington State Comm. Coll. www.wscc.edu) has classes for $67 per credit hour. Certain classes transfer equally if planned out. Is it really worth it to stay here and take classes? How many of you are taking classes at a community college at home??