I paid £1400 for a set that I use as winters, no tyres or TPMS. I’m always on the lookout for another set to have as spares, but wouldn’t pay more than £1200 these days. There are loads of sets for sale for £2000-£3000 and individual ones for £500-£600, but pretty much every set/rim I can see have been for sale forever, asking prices and what they’re actually worth are very different things.
People asking mental money always quote new dealer prices, but I don’t think it’s that relevant as I don’t know anyone who’s ever paid full dealer prices. My sensible car is an X5, I bought an immaculate set of OEM 22”s with very good tyres for £1500, brand new from a dealer they’d have been over £4500, who’d actually pay that?