Junk. I just tossed a handful of 300GB. Almost impossible for any of these old drives to pass tests and thus opens the seller up to returns, refunds, paypal disputes and other problems not worth the $10-20/ea they're worth... sure can sell as-is no returns but then probably worth $5, etc... so IMHO not worth the hassle, time, etc, to sell.
I have some old SAS 300GB 15kRPM NOS I need to bundle, and sell or I'll just chuck them same for the 50 or so random WD RE 500gb SATA I have sitting here from used server/chassis purchases those should be worth $15 though at -least LOL
and in quantity decent cash if I can unload at once.
For 5 or 10 I would chuck pretty much anything worth <$20 or give away or sell in a bundle, etc.