Found this gem at the flea market. Sansa E200 series. Excellent condition, came with all the accessories. Paid $15. Works with a 128gb formatted as FAT32. : r/rockbox
SanDisk Sansa Clip+ 4GB Rockbox MP3 Player Dual Boot No-FM Europe Version | eBay
Sansa Clip Zip - Custom Rockbox Themes | Headphone Reviews and Discussion - Head-Fi.org