I usually use Merkur Versicherung AG (Austria)'s basic health insurance, which has always given me reasonable rates so far. I think I paid something like 75$ for a two-month stay in a developed western country. Extrapolating from that (you can only get bulk discounts if you buy a whole year ahead, no way it will get proportionally more expensive), one year with them would be around 800$, which is still a great rate.
"Imagine" by HCE | Hitler reacts to Battle of Montreal | An alternative use for squid that has never crossed your mind before