I got mine from Walmart for $9.99 too. When I ordered it on Sunday the website said it was Backordered but it shipped out on Monday and I got it yesterday.
I really don't get AT&T with the pricing of this device. I checked the website and they want $299-MIR of $100. I also checked the sites like Walmart, Crackberry, etc. and the prices offered are way less. I don't know how they expect to make money from the device sales. The only way is through the plans.
I got mine from Walmart for $9.99 too. When I ordered it on Sunday the website said it was Backordered but it shipped out on Monday and I got it yesterday.