Genrate Sales from 3 New Websites

I have 3 new websites due to be going live later this month. I am looking for somebody to generate traffic to these sites who is willing to work on a commission basis. As the sites will be completely new, I am willing to pay the succesful bidder a fixed percentage commission for all sales that are achieved through the sites. A legally binding contract will be drawn up to be signed by both parties, initially i would envisage a 6 month agreement, but I am open to negotiation. Site A is office supplies, aproximately 16000 products Site B is catering equipment, aproximately 12000 products Site C is mobility products, aproximately 300 products If you feel the creation of socail media pages etc are required I am happy to discuss fixed prices for such jobs, plus ongoing payments for maintenance. Any questions please ask.