I was just about to mention the same thing. Let's say someone on H has one, a USPS small flat rate box cost $9 a whopping dollar more than getting one from eBay. Best part is if it doesn't work you could always hold them accountable and get another.
I have two lenovo mini PCs here that were tossed out at work. With the standard 2.5" drives still intact. Figured SSD's would be a decent upgrade for them.