Thanks to benguild for the blog article. I had seen used books in Amazon price lists as shipped by Amazon and qualifying for free supersaver shipping, but I'd

Thanks to benguild for the blog article. I had seen used books in Amazon price lists as shipped by Amazon and qualifying for free supersaver shipping, but I'd never gotten around to finding out how this "fulfillment by Amazon" worked. I looked at the info on Amazon's website and I still have a couple questions. (1) Amazon charges a fee of something like $0.42 per pound when shipping. Is this just for supersaver shipments? Or does it also apply when Amazon collects from the customer for standard or expedited shipping? (2) I see Amazon charges fees for storage and shipping, but I don't see where they take any percentage of the sale. Am I missing something?