That $2,300-2,500 range sounds pretty reasonable to me given the bike's age and mileage. I guess it really depends on your local market. A month isn't much time either, but the good news is these bikes seem to sell fast most of the time.
Too bad you can't take it with you. Shipping prices for big stuff has gotten pretty insane in the last few years.
Best of luck with the sale and the move.