If you’re looking to get an iPhone at the low, low price of only $99, but not sure 8 GB will be enough space for you, you may want to try RadioShack. According to a new training document sent out earlier today, the black or white 16 GB version of Apple’s “iconic device” is only $99.99 with a new two-year contract. Although the document does say the offer is good on all three iPhone carriers, it’s safe to assume that the 16 GB is not available on Sprint, since Apple never shipped a Sprint-compatible version of the 16 GB iPhone 4. There is also a note that the 16 GB models are in short supply, which is most likely due to the fact that they are actually just old stock, not newly-shipped devices. As noted by a small note later in the training, the 16 GB model will not be available at all stores, so if you’re thinking about going to pick one up, you may want to call the store first to make sure they still have some in stock.