Well, unfortunately they're no longer building forty year old used
training gliders. Go look up what a new 2-33 cost from the 70's
through the 80's, adjust the price into 2011 dollars and then compare
it to what a new PW-6, ASK-21 etc. costs. They no longer seem so
expensive. The last time the L-23 was available new it really wasn't
particularly inexpensive either.