While it recently sold out, the Nextbit Robin is now available once again from the company's store. The GSM versions of the phone, in both Mint and Midnight colors, are in stock, with shipping times currently estimated at about two weeks.
The Robin has come back on sale fairly quickly, with the company announcing that it had sold out of the phones just last weekend. For more on the Nextbit Robin, be sure to check out the Android Central review. You can get the Robin from Nextbit for $399.