Hi Chap,
First of all, I think you posted in the wrong forum. Ho hum.
Anyway, as with anything PC based try and buy what you can afford.
I am assuming you are talking about Microsoft Flight Simulator 2004? If so a bog standard joystick can be obtained from most PC shops or internet i.e. PC World or
www.dabs.com For flightsim use you are looking for a joystick with throttle and a twisting hand grip for yaw/rudder with a POV hat and about 6-8 action buttons.
Logitech or Saitek are good buys.
I personally would have waited 2 months for Flight Sim 10 to come out.