Here is a very cheap FPV setup, you can get 1km+ range with this setup, its a nice start to FPV.
And if you use a directional antenna on the receiver you could go above 2km.
Boscam TS351:
http://j.mp/1iwjZzR
Boscam TS353 400mw:
http://j.mp/1gJ6t7s
Boscam receiver RC305 5.8Ghz:
http://j.mp/1cRoJjy
RC305 + TS353 combo:
http://j.mp/1iuhzQ6
Antennas (circular polarized)
cloverleaf antenna to rx:
http://j.mp/1arIRFU
Cloverleaf antenna to tx:
http://j.mp/1dG8kbW
Boscam 7" RX-LCD5802 5.8GHz Diversity Receiver:
http://j.mp/1lZuham
LCD Battery Charger:
http://j.mp/1h3CreQ
Just to show how well this setup works here is a video i found on youtube (4.6 km on minute 8:14), in the description is the setup used, and you can read RC305 and TS351, just like this setup:
http://www.youtube.com/watch?v=7pkYzuNXp_c