I've been charging $500 for basic websites upgrades, plus $50/hour for further upgrades and updates. A typical eCommerce website costs about $1000, plus about $2-$5 per product (depending on complexity). The $1000 includes: a custom layout created in Photoshop matching your logo, custom HTML website template, about a dozen basic web pages with multimedia, company pages on every major social network (including Google+ Plus, Facebook, Twitter, Pinterest, YouTube), and a wordpress news blog to supplement the website (beware of amateurs trying to sell wordpress blogs as commercial "websites").