GPS trackers for bikes

[speedict mercury ebike user]

Used an expensive garmin tracker and a cheap one from ebay with sms location sending. Garmin was super. You pay an amount per year to garmin and you see a live dot moving on google maps just like 007, ni sim card needed, it connects via gps to a garmin server which sends you the location in real time. The cheaper one is not a moving dot, you get the location when you send a text. The links i have seen here look very expensive and work just like the cheap ones from ebay.