Sony portable radios have gone for > $1K
Radio collectors are a mystery to me
I will admit to being somewhat of a receiver collector, mainly vintage gear that I wanted when I was a teenager/young adult. Nostalgia, really. It's about finally being in a financial position to own radios that I thought would be awesome to have instead of my 1960s multiband portable that I used for many years.
That being said, I'd never pay the price that most of them are offered for on eBay today. Way overpriced, IMO. If I'm interested in a specific receiver I'll wait for a good price, as they are also sold on QRZ, eHam etc. I did, however, drop quite a bit on a Drake R7A because it was within driving distance and sold by someone I trusted. Had an R7 before and foolishly sold it, really wanted another, but if I wasn't able to actually see it before purchase I would not have bought it.