HP VT21 worth using?
I bought an HP VT21 in the 1980's. I never got a chance to build anything to put it in. It is 100% complete, box, instructions, etc. I have never even started the engine. I'm wondering if this engine is worth using? Does it have any collectable value that would go down by being run? Bottom line, should I sell? And if so, does anyone have an idea what it's worth? Or should I find a kit I can build so I can use it?