always wanted one of these models then prices skyrocketed. now there’s not much of a point as the primary novel feature, uploading, was reverse engineered for all other NetMD models (ones that take standard batteries and have screens that don’t burn-in), just need a WebUSB browser and go here: https://web.minidisc.wiki/
There's still bargains to be found, I (honestly) picked up a mint RH1 from Ebay for £180 last year.