Why would anyone buy a Sony Walkman cassette player these days?

So, I was checking Ebay and I saw that there were plenty of Sony Walkman portable cassette players offered for sale. I didn’t expect to see any, and if there were any, I was expecting prices in the $10 to $15 range. I was surprised to see some asking prices in the $50 to $125 range! There’s even one offered at $700! Are the sellers clueless or is the Walkman turning into a collector’s item? I can’t imagine why anyone would buy one these days, when you can simply download music to your smart phone, and you wouldn’t need to carry an extra piece of equipment.

I have a unit that has auto-reverse, graphic equalizer and TV/AM/FM reception, and I’m pretty sure I did not pay $125 for it even when new, back in the day.