Selling an '03 Miata Shinsen Version in really nice shape, 43k miles. The first person who comes to look at it is a local middle-aged woman who shows up in her '94 Miata, meeting me in my work parking lot (while I'm at work). I give her the keys to take it for a test drive, tell her to take her time (it's a nice day out, I want the buyer to fall in love with the car, I have no problem with a few miles getting put on). I told her to give me a call when it's back, and to leave the keys in it.
She calls me back about 30 minutes later, lets me know the car is back, and that she wants to talk to her husband about it - cool.
So - I go out to the car just a few minutes ago after work. It's parked right where I had it, keys in it, so far so good - I notice a large bug splat on the front bumper (bummer, just waxed the car last night, but not a big deal and to be expected), and kneel down to take a closer look...and I notice the scrapes on the front lip. These were definitely (OK, 99.9% sure) not there before, and if they had been, they would have had wax residue from me waxing the car last night.
Left side of bumper:
Center of bumper:
The car has ~15 more miles on it than it did this morning, not a big deal. The bumper is kinda/sorta a big deal to me, even though you can't really see it unless you're looking for it. That kind of thing matters a lot when you're selling a car that's particularly clean for the year.
So - what would you do? My first inclination is to not say anything about it until I find out whether or not they may make an offer on the car. They may want to buy it, and I don't want to scare away a potential buyer. But - what if they decide not to buy the car/make an offer? What would you do then? Do I have any recourse at all? Unfortunately, I have no pics of that front lip specifically beforehand, so my only "proof" is that I believe wax residue would have been very obviously stuck in those scratches from the pretty thorough waxing I gave the car last night.
This is the car.