As of this writing, while the C64 emulator app still shows up in the iTunes App Store, attempting to buy it results in the above error message:
The item you tried to buy is no longer available
The availability of the item changed while you were using the store. The same item may be available with a different price or elsewhere on the store.
Whether this is just a glitch in the system, or a result of Apple pulling the app due to the BASIC interpreter still being accessible via a workaround (which would likely be a violation of App , is unknown. If the latter, hopefully the developer can update and return the app to the store ASAP. Given how fast Apple has been processing Facebook updates lately, it shouldn't take long to get a revision up, right?