I’ll be first to respond and I don’t think you’re going to like our opinions. Honestly, it does not look like you did any improvements to the machine since you got it. Works 100%, I’ll take that with a grain of salt.

The cabinet has been painted over with some form of green. A lot of work there. LED’s installed throughout. Pops need to be rebuilt, which tells me much more work is most likely involved.
As a collector, I would offer $250, maybe $300 tops, because I know how much work would be involved to bring this machine back to life. Just my opinion.