Low Budget G.I.
I recently ordered stuff from the german gadget site pearl.de wich were quite cheap and I received what look like dog tags.
Those are actually tags to put on your house keys so that they can be returned to you via mail. For a fee of course… 😉
So I sanded the the thin engraved info off the tags and gave them a worn out effect with a grinding stone on my Dremel.
Add one cheap sink plug chain and you have the cheapest dog tags ever.
Now to find someone who can punch my name, birthdate and blood type on them. ^^