As Bea said Bill Gates was out at the main store when they were first released and she was taking people for rides as well. Due to the way they work you MUST have the owner riding with you to to be able to ride. I'm not sure if they will be able to use a scratching post.
As for the price of them it varies as does every cat on what other traits it may have and how much someone wants it.
More MEGA-PUSS questions
KittyCatS lover and LazyCats auctioneer. 
