i ebay'd the led, it was $6.99 with free shipping for the led, heatsink, optic, and driver that plugs into 120v so i had everything besides the thermal paste and soldering included.

i wouldnt buy from nanotuners i had bad experiences with them. try rapidled.com i have a 5.5g nano and i have a 6 led system above it and its fine for growing anything. i am sure you could get away with 3 leds but it really depends on what you want to grow.