It is a good one, shame about the broken chain. Original canteens are plentiful. Don't pay over $10.
Looking for WWII U.S. dog tags
I would say 5$ to 10$ no more.
I agree - there are still lots of these available.........
I doubt you can find a decent war dated one on ebay for only $10.00.
OP doesn't say where he is or even the country-this makes a great difference to availability of things that may be common in some places, rarer in others.