Besides my 40-hour gig I do other things for money, too. The way I see it, the transactions I'm in, the person is buying either a) something I made; b) something I am doing for them; or c) both.
I do not think the buyer is purchasing "my time," and I doubt the run-of-the-mill customer thinks that's what they're getting when they hand over the cash.
Nevertheless, people frequently say, "I'm not sellling X, I'm selling my time."
I suppose. But when a customer says, "I'm not buying X from you, I'm buying your time," I think that maybe reality is being stretched a bit too far.
Call this semantics if you think that'll stick. I call it bullshit. You want to buy my time, you just give me some money, and I'll go read a book.