I mean, the bug and the feature of an Apple Airtag is the ubiquity of their devices and their ability to backchannel BLE over cellular networks using millions of end user devices with their pseudoconsent.
Just by the nature of how that expansive network functions, there is no similar alternative that you can control the privacy of.
The alternative would be a GPS transponder intended for vehicles, such as LoJack, or something similar. They are going to have power and subscription requirements, usually cost $1000 for the hardware etc. And in that scenario you still have to “trust” the vendor to a degree.






Karl Jobst has done some good investigative journalism on the auction fraud and the “fractional ownership” trading platform scams.
Historically, auction houses and platforms are often using relationships with celebrities and influential people to artificially boost the prices. The platform provides the veneer of a neutral open-market sale. The celebrity provides the “credibility” of a rich buyer, justifying the record price on the game or collectable.
I’d say don’t take any retro game prices at face value, and understand your own local market before buying anything. You can list things for any price you want on eBay. Doesn’t mean the product is routinely trading at that price. Wata can list and claim a “sale” at a ridiculous price on their own platform, and currently there is no way to credibly verify that sale was to a real buyer, and not pre-arranged or fraudulent in some way designed to inflate the precieved value of the item.