Diesel generator project

This generator run my house at its ease , the engine was always a little rough and a bit smoky on start up but once running it cleared itself and ran very good until it didn’t , engine turns over but it needs work , the electrical end of things was and still is 100%, never an issue with power when it was running ,I am selling with a full brand new gasket kit, there was a slow oil leak from somewhere underneath , barely ever had to top it up with oil but it is there nonetheless, I’ve a feeling the injector is the main culprit but I haven’t the interest or time to fix oil leak or replace injector , I bought a new generator when it stopped as I needed one straight away , it’s probably worth a few hundred in scrap alone , I cut a hole in the top (as seen in pics ) to access the compression lever as it made it easier to start when it was working and valve adjustment also , it is a reasonably quiet generator when running as diesel genes go , no offers please , I’ll scrap it if I don’t get 150€ , the gasket kit cost 70€