Commission based on results for retail site

I am currently creating a retail site. My niche is that I am able to sell items including watches, shavers, house accessories etc at very low prices not found in shops or online. My site is located at [login to view URL] and unfortunately I am only able to sell to UK customers at the moment but I will be adding many more products in the future. I would much prefer to pay for results rather then pay an initial fee and would give someone 50% commission on all profits for at least 6 months to anyone who can produce sales for the above site. So for example if as a result of just a few weeks of marketing this generated sales for the next 6 months you would get 50% of all profit over a 6 month period. Paypal receipts for all sales and screen prints of my paypal account for all sales would be made available as evidence of sales if necessary. Any advice on improving my site would also be much appreciated. Please email me regarding questions or advice.