MrBrown said:

Maybe you just pick someone randomly who helped with one of your projects in some kind (helpful suggestions, donations, ressources) also the winner, and recipient (if he agree to take them) should have to pay the shipping..

I agree with MrBrown, but maybe with a slight tweak in that you ask the loyal supporters if they want to be entered in to a drawing then go with a random number generator. You could even raffle off each one separately if you wanted to spread out the love. I also agree that the winner(s) should pay shipping (in fact this would be a necessity if you go with the splitting up method).