For a limited time, you can purchase a refurbished, factory unlocked One (M8) from HTC through eBay, priced at just $389.99. The One (M8) is still one of our favorite phones of the year, so if you have been thinking about purchasing a phone off-contract, this deal would be one to take advantage of.
These models feature 5″ Full HD displays, 32GB of storage, HTC’s duo camera setup, Snapdragon 801 processor, 2GB of RAM, Bluetooth 4.0, and run Android 4.4+ with Sense 6 on top.
As for compatibility, unlocked variants will work with GSM carriers here in the States, but AT&T would be your best bet for connectivity. Sometimes T-Mobile service can be spotty with HTC’s unlocked units.
As mentioned, if you are in the market, the One (M8) is still a solid choice.