Not sure that $25k in today's dollars has ever translated to a new glider.
http://www.dollartimes.com/inflation...7000&year=1968
For example, $7K in 1968 is now just under $50k
That means your ASW-19 would have cost $5k delivered when it was originally released in 1975...
Long story short, Bob K is taking orders, get your HP-24 while you can!