I've seen people post want ads for the platters for 'art projects', but that's about it. Honestly they're not especially repair-friendly devices for end users (chunky MFM/RLL drives from the early '80s, maybe. Multi-gigabyte 3.5" drives from the mid-'90s, not really.)
There's always some minescule chance that someone's trying to recover data from a drive with a burned out controller board & needs the exact one you have (assuming that's not what failed on yours), but honestly, I wouldn't count on that happening. Most home users don't care enough about their data to go that deep into it.
I guess you could see if any professional-level data recovery services might need them & ship them off.
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