If you were closer, I would say $100 and come get it yet tonight
Similar set ups around here average $300-$500. You have better filtration, heaters and lighting than the typical craigslist tank though. I believe a good place to start is $600 and let them talk you down.
chefjamesscott had a good thought...keeping what you can use for your bigger tank. Selling only the items specific to your tank, you could probably still get $250-$300.
Of course, these numbers are all just "best guesses".
Good luck!