I ordered a box and they arrived Tuesday. At first they looked identical to the much higher-priced ones I’ve been buying at Wegmans at 10 for $7.99 (no idea who makes those; just a generic blue and white box that says "Earloop Masks, Premium Non-Medical Use, 3-Ply, High Quality, Melt-blown Fabric, made in China). But when I compared them further I noticed two differences: the inner white layer of the eBay mask is smooth while the inner layer of the Wegmans mask has more of a quilted look. That made me think the Wegmans mask might be better quality. But while wearing them, the Wegmans mask doesn’t move when I breathe in and out even with a close fit while the eBay mask does, and I’ve heard that’s a feature you should look for in a mask to show that it’s fitting snugly enough with few air gaps. All 50 look good, nose piece works well, ear loops seem fine and are even long enough that if needed you could tie a knot in each loop for a closer fit. At 50 for $5.50 these will be great for one-time use in fairly low-risk settings. I’ve read that some people wear two for added protection; haven’t tried that but guess it’d be worth the added peace of mind in a higher-risk situation.
These certainly are inexpensive. Thanks OP.