I was lucky with this one, I payed 5K for it as a non runner about 7 or 8 years ago, which at the time seemed to be about the going cost, arguably cost me nothing since I sold my KH 500 for 5.5K to fund the purchase.

Probably spent another 3K on it over the years - mostly on the JL Expansion chambers.

It can be a bit of a beast though.