First you should set the obverse in the holder correctly. It's tilted a bit. You can see the IGWT is off. Look at the crop. The IGWT should be parallel to the bottom of the 2x2. Even your picture is tilted so that would affect the Reverse rotation also.
And.. I don't think there was a need for another thread under What's it worth. You could just ask on this thread
That's better I can't say that it has a huge premium. There are no set prices for rotated dies and it maybe just what a collector may be willing to pay for it.
It looks like it might be rotated just under 90 degrees. It would be easier to tell if you would staple the 2x2. Using the obverse of the coin as a guide, use two staples at 12 o'clock, and one staple at 3, 6 & 9 o'clock. This will aid in determining the exact degree of rotation. Paddy is right. You won't find any price guide for rotated dies. It's pretty much what someone is willing to pay. Chris PS. Nice find, but don't go out and buy a new car just because you found it.
Rotated dies are fairly common. Yours appears to be around 45 degrees, which isn't too significant (up to 15 degrees off is still within mint tolerance). Once you get greater than 90 degrees off, the value begins to go up. I'd expect your coin is worth a couple of dollars. It is cool, and I'd keep it - just not worth a whole lot.
Close to 90, nice find, my suggestion is check eBay completed sales to see what the market is paying.
Sure looks like 90 to me and I'd hang on to it how often do you run across something like this...but if you really don't love it...oh well hope you find a buyer who appreciates it
Using the link @paddyman98 provided, I came up with this. Even though I don't have any rotated die coins. It might come in handy later.