These aren't recalls in the pure sense as there's nothing necessarily wrong with the products
themselves, but some sellers (especially on eBay) list them with wrong descriptions which can endanger the buyer. In roughly-descending order of hazard:
- UVC (germicidal) lamps sold as “blacklights”: Will immediately damage unprotected skin and eyes. Easy to identify by looking at the lamp (UVA tubes have a phosphor and the “Blacklight Blue” variant uses dark blue glass, while UVC lamps are clear with no phosphor), but uninformed people have been burned more than once. (Making germicidal tubes the same size as normal fluorescents was a mistake IMO, but the Chinese might have done it anyway…)
- Ozone generators sold as “ionizers”: In a small room, the output from a powerful ozone generator could build up to harmful levels.
(True ionizers have only the negatively-charged needle or carbon fiber brush emitters at the output, they do not contain the surrounding positive “ring” electrode used in many ozone generators. Other ozone generators use high-voltage AC instead of DC.)
On eBay I have seen “induction” cooktops with glowing elements in the pictures, but without buying one I can't tell whether the description or picture is wrong.