> Seems very unethical, no?

I don't think one can judge it ethically without considering the context. Are we talking about mass automated scraping? Or are we talking about me trying to get a good deal by scraping local used car dealership listing once per day for my personal need (just so I don't have to do it manually)?

One of these is strictly more ethical, but both will be blocked by Cloudflare for example. I'd happily use such service in my personal case.