I had an ex-demo original f650. No issues.
In reality, the bike is ridden within it's design envelope. So should be able to handle it.
So a few riders revved it out or laboured it? So what! It is not an over stressed engine.
It will probably be run in better than the bikes whose owners ride them like a nana.
Think about it, some bikes do not get ridden hard enough. The rings don't get a chance to really bed in.
I had an ex rental R1200gs. Probably thrashed now and then. But it ran like a dream and never used any oil.
Go for it.