Sales Page Copy and Creation

We sell affiliate products. The initial sale leads to upsells, and for each of these upsets/additional products I need a a very professional sales page with expertly convincing sales copy. These types of sales pages tend to be lengthy and comprehensive. The position requires expert English selling skills. I have a very good graphic designer with whom you would be working. The goal is to launch a new site every week. Each site would require two upsells at most.