Use the link to get the TrackR Pixel 5 Pack US$49.99 or use the
FOUNDIT code for 30% off the other combos. When you follow the link, click on the 5 for $50 graphic to get the deal.
I saw someone post a Tile deal. I'd recommend TrackR instead.
TrackR is the main competitor to Tile. I think it is almost as good and you can replace the batteries when they run out.
With Tile you have to replace the tile every year. They don't allow you to replace the battery as they will expire the tile after a period of time anyway. They offer a deal where you can send in the tile and get a new one at a discounted price, but it's still quite expensive, especially if you have several devices.
These are a lot cheaper and you can also get free battery replacements through the app.