Being supermassive, I'd say they're worth 3-4. Distance penalty not included.
2 of the Uruguayan states went well, so you've spent 5 points, and still have two remaining. You sure you don't want to claim states next to ones you already own?
Distance penalty applies if the state you're claiming isn't already next to what you have. Example: if you own Rome, and claim all of Southern Italy, the parts next to Rome cost 1 due to being adjacent, but the ones not next to it cost 2 due to distance penalty applied; this is the result of them not being next to what you own as of the claiming.
Claiming another part of Uruguay would cost you the remaining 2 points.