I have been working on my website - making it easy for anyone wanting to purchase any books. Now there's a button to pay through paypal with the author price, one button to contact me with your list of what you want, at the author price, while I wait for your check, a button to order the book on amazon and the last button to get the kindle version.
Without downloading a "store" app, it's been challenging trying to design it to cover these needs without all the bells and whistles! (and maybe added costs) LOL Luckily I enjoy doing this type of work!
Now I just need someone to come in and USE it! ;)