That was mostly tongue in cheek ;-)

There was an old restored B-17 bomber that was flown into town a few weeks ago. I'm sure a ton of money was poured into the restoration, yet they frequently take people up for rides in it, - for a price.

The thing is old and complex. They're probably dealing with mechanical failures all the time, -some costly to fix, yet they still take it up. That's my kind of restoration.

I don't see it really as a question of ethics, -only opinions. You buy a bike, you do what you want with it. If it's one of a kind or has got some cultural significance, then maybe ethics come into play, but I don't think that's what we're talking about.