I presume it is a f9-f10 - not a short tube refractor. Andrews have a celestron 90mm/900 f10 refractor on az3 for 229
, at this price you could afford a decent widefield ep like baader hyperion 24mm for $219 & also a generic planetary ep (in the LP section for $99-the 6mm is much better thn the 3). i rhink the ep's will make the viewing better than spending bit extra on the scope.
total cost = 548, which allows for postage as well