Have a look here B24:
http://www.spysite.com/catalog/GPS-V...p-1-c-475.html
You can easily google it and compare prices and contracts etc from different sites, but this gives you a global idea...
I for my request like to once more state that I'm interested in the TRACKING OF PERSONS, not personal items, and law/legislations in regards the matter in the UK and the rest of Europe... (as example see the item above, from the BBC article about tracking of persons in Mexico).
Anyone??