I really need to get some lotto numbers or blackjack tips from you guys who keep running these OhNo's, ya'll have obviously got a fatter wallet than I do. The last one I had (like most of them) OhNo had discontinued parts support for, I was always trolling through ebay and craigslist to find something or another. When you finally found the parts, they cost a fortune. I'd get it fixed and then a month later something else on it would break. All the years I fought with that generator, I spent at least $1k a year keeping it going, and because of how long it took to get parts it only worked right maybe 6 or 7 months a year. Its favorite thing to do was break in the middle of summer when you really need ice and a/c.
Like the OP, when I decided to swap it out it was one of those rare times it was in good working order, a guy drove down from the carolinas and picked it up. I knew good and well it wasn't going to stay working for long, it never did. I told him that but he wanted it anyway. That thing was horrible. I replaced it with a 12.5kw Phasor that cost me $0 a year, I only ever had to change the oil and filter on the for 5 years afterwards that I owned that boat.