Smart Manager, an essential plugin for anyone with a large WP e-Commerce store
Smart Manager by Store Apps
If you are using WP e-Commerce and you have a lot of products you really must spend $100 on Smart Manager. It is awesome. Basically instead of the one by one backend product editing that you have in WP e-Commerce you can see all of your products in spreadsheet form right in the backend of WordPress. You can make a bunch of unrelated little edits to many products and just click save. You can say reduce everything selected by 15% or everything in a category.
You can change the base price, the one that appears in Carousels etc after you have added variations to a product, that may sound a bit technical at the moment but doing it in WP e-Commerce takes about 20 clicks and updating the page about 5 times for every product. In Smart Manager you can change it for 50 products with a couple of clicks. No need for me to try and explain it all, visit their site.