Hi, I'm looking for some guidance, I have a client site with an established business within a niche but competitive retail sector. The client has a positive reputation and as such they wish to expand their business online by selling items via a branded retail site. The site was developed some 18month ago, but unfortunately due to the company's lack of in-house personnel the website has yet to be launched. The company owners have asked me to help as they have little time to dedicate to maintaining their own site. I have offered to maintain and market their website based on a commission of all sales minus PayPal/Protx costs. With work required to include ongoing design, product updates and search engine optimization what level of commission would be seen as reasonable? I have indicated an initial figure of 20%, is this fair?