The books can still be found, used, on the various internet booksellers as well as 2nd hand shops.
As literature the novels are barf, lots of stock characters and very few "levels" to the writing ( though Stackpole averages better). As entertainment, they are a blast.
The CBT tabletop game is alive and well with thousands of adherents. I suggest the following forum for those interested.
www.battletechuniverse.org
Seamus (Vegetius on the other site)
Bookmarks