fritz,
Even if it was a "best seller," how many do you really think were sold in a year?
How many new guys build their first plane?
I know I wouldn't have started this hobby if I had to build the first one. After I started flying with an instructor, and knew I wanted to continue, I decided to try building. My first kit (Great Planes PT-60) took me almost a year.

eagle,
There are still some trainer kits available
Great Planes PT-20/40/60
Great Planes Goldberg Eagle 2
SIG LT-25 and 40 (availability varies, call SIG when ready to buy something)
Various other SIG trainers (availability varies, call SIG when ready to buy something)