I just acquired a Pudibe brand labeled one (latest model that still looks like the Garret Carrot for around $28). I took the risk, but it works in air tests.
I never had a PP before, but it looks to perform like a PP at low sensitivity (in other words good enough).
Coins 1.5-2 inches with tip being the most sensitive.
Crumbled up foil the size of a BB only registers while touching the very tip.
People will probably scoff at that, but that's good enough for me being that I put off from getting one for a very long time.
It supposed to be waterproof, but I'm not taking that chance with this one (except probe part, and light rain despite that I Teflon taped the battery cover threads).
Amazon product ASIN B07NXQ4X42