new graphics card

Hello all,

Ive had flightsim on my desktop pc for long enough now, and its starting to really annoy me with the lag. I looked around and did some tests, turns out its my graphics thats letting me down, and ive looked around and found a good one, its called the "asus gtx 750ti 2gb edition" on amazon, however im 13, and i dont get pocket money, nor is there a way i can :( my family say they think my fsx wont help me, so they wont buy it for me. I dont know what to do anymore. Its a shock i have the pc i have at the minute, but thats all down to my mate because he didnt need it anymore. Please help me!!! I really want to fly properly!!!!!!

Kind regards,

Luke