The Amazon webpage shows the kindles being 'in stock', shipping within the US shouldn't be a problem.
They do offer free shipping, for just about anything over $25, or you can choose two day shipping for an added charge.
I like ordering from Amazon because of their 30 return policy.....no questions asked and their CS is amazing. You won't be dealing with a part time sales clerk that knows nothing about the device.
Here is a page with more details.....The "contact us" button on the right lets you sign into your account, choose the 'call me' option, enter your phone number, and they call you right back if you come across any problems or have questions.