Hey Beth,
I have a friend in Brookline who has a share in a farm. Here are the fuzzy details that I remember (so don't hold me to them). She told me that she gets it delivered for about $520. I think the share is supposed to feed 4 adults and the growing season is around 22 or 26 weeks. She's on vacation now but she promised to pass on the info to me later.
We are definitely interested. We went out to Drumlin Farm in Lincoln a couple of weeks ago and produce there was definitely cheaper than at B&C. Here's a link to Community supported agriculture
CSA.
Anyway, you might already know about this but I thought I'd pass it on. And if you do now of a CSA that delivers to Boston, please LMK. I think Lincoln is pretty but I don't want to drive out there all the time.