Via Deadspin.com, ticket prices for upper box seats in 1984 were $7.50. In case you hadn't heard, they're slightly higher than that now.
I seem to recall - and don't quote me on this - paying $14 per ticket for the right field boxes back in 1998-2000, when I went to 2 games each summer. Those now go for $45. I sat in the loge boxes for $20-something and those now go for $85 each. Yowsa.
Add in $30 for parking and another $45 in concessions (a conservative $15 each), you're talking about $210 for 3 bleacher seats. Plus souvenirs.
I say good for the Red Sox. Supply and demand, baby! Charge what you can get.