thanks J--it's a permanent boxed set. I expect to leave it at $7.99 but I can't make any promises (although it will never be more than $9.99)! There are now five volumes of these sets out there, (one is non-US since I don't have the rights there). I will be putting out one announcement a week for each of them.
I respect my readers and believe they deserve both a bargain and DRM-free. I hope you enjoy the tales.