This smart luggage lock has effectively replaced the AirTag for me when traveling, and it's under $25
Briefly

The SmartLock is a TSA-compliant travel padlock featuring a built-in finder tag for compatibility with Apple's Find My network. Weighing about 3.5 ounces, it is somewhat bulky but offers decent resistance to physical attacks. The padlock includes a 3-digit combination lock and a wire loop, which provides basic security against opportunist thieves. It is rated IPX3 for water resistance. The finder's tracker functions similarly to an AirTag but lacks precision finding capabilities and requires a replaceable battery.
The SmartLock is quite big and bulky as travel padlocks go -- it weighs about 3.5 ounces -- but it combines two functions in one.
Security is offered by a 3-digit combination lock and a wire loop. Like I said, not great, but good enough to deter opportunist thieves looking for an easy pick.
The finder module is compatible with Apple's Find My network and has the same limitations as all other third-party trackers.
The SmartLock is IPX3 rated, so it will shrug off train and water splashes with ease, but won't tolerate immersion.
Read at ZDNET
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