Here is a working, tested 50-pin 104M SCSI-2 hard drive made by Conner Peripherals for DEC about 37 years ago. It uses four 3.5" platters spinning at 3575 RPM with a 32KB cache.
The drive you will receive is has been tested successfully in a Windows 7 system with an Adaptec 29320A SCSI host adapter. It was recognized immediately. I used the Adaptec to perform a new low level format and verify the drive. I created a single FAT32 partition formatted it. It has 98MB (strictly speaking) or 104 million bytes of usable space. I also ran HD Tune under WIndows 7 to verifiy that there are no bad sectors.
Buyer will receive the exact drive pictured here, but nothing else.
I offer a 30 day return privilege and free ground shipping to any U.S. zip code.