There are only 2 mints that struck these sovereigns, Sydney and Melbourne. It looks to be in perfect condition but I would doubt it, at best probably aUNC, (About Uncirculated). Can't really tell from the photos.
aUnc = $525 for both S and M mints. Will have some wear on the coin.
Unc = $950 (Sydney) $925 (Melb). There will be no wear but will be some scratches on the coin.
ChUnc (Choice Uncirculated) = $2100 (S) $2200 (M) It would have to be in perfect condition with absolutely no scratches.
Gem = $4400 (S) $4500 (M) It would have to be in perfect condition with absolutely no scratches and have a very bright lustre to it, definitely not a dull coin.
Proof = $145,000.00 Only minted in Melbourne so will have an M under the head of Queen Victoria. This would have to be verified by a qualified numismatist like Downies or Spinks.