Here is my
personal opinion if I were buying it (assuming everything works)
Hypertherm 1650 G3 $2500.00
Hypertherm Sensor PHC $1500
table and linear motion stuff $600
The controls might be worth something but being 15 years old not much. If it breaks it will cost a bloody fortune to get it fixed.
The motors and mechanics have value but do not count on keeping them if the controller is not working or needs to be replaced. Controls and motors have changed a lot in 15 years and finding something besides another Koike that would just plug in and work might be difficult
Be aware that is a big heavy gantry and doing a retro needs to take that into consideration.
My ONLY basis of the values is from calls I get that start " I just bought a [insert the brand/model here] cutting table and I want to know what I need to upgrade it to modern controls...." i know how much it takes to build one from kits and It seems pointless to spend more buying and reto fitting a "classic" than to have a DIY build that will out perform it .
TOMcaudle
www.CandCNC.com