I have not been doing this long enough to comment but I do have a Roman Harvest sold if I can ever get it good enough to sell.
I also have a lot of interest from the civi staff at the station
I think maybe it is something that should be considered if I am going to take money from these poor innocent victims.
I had thoughts of saying something along the lines of: "It's all an unknown quantity until someone has used it for some time so I can't guarantee anything, but will do my best to replace or repair if anything fails within a reasonable amount of time."
Then argue about what that reasonable amount of time might be.