That is a very cool revolver. I believe the 629-2E is fairly rare. I thought that the Classic Hunter started with 629-3; however, it did start in 1989 with a 629-2. The barrel looks like it started life as 3" based on where the roll marks fall. I have not heard of a 629-2 with a 3" barrel, but the "E" indicates that it was unusual anyway. A factory letter would be worth it for this one!
All that said, $2,300 is a bit high IMHO without a letter confirming that it left the factory with that 3" barrel and an unfluted cylinder.
Edit: I found a dead link to a Tyler Gun Works ad for a 3" 629-2