Okay, so there's a small chance the Galaxy Note 7 might explode. That's a bummer, but older note phones probably won't do that. It just so happens a lot of them are on salve via Woot today. These are all refurbished phones, and a few of them might have some cosmetic damage, but they're cheap.
Woot has several models available—there's the Note 3, Note 4, Note Edge, and Note 5. All are unlocked, but the band support varies. For example, the Note 5 is an unlocked Sprint device. It has most of the LTE bands you need on AT&T and T-Mobile, but not all of them.
The cheapest is the Note 3, as you might expect. It's just $144.99. The Note 4 is $189.99, and the Note Edge is a little higher at $219.99. Hey, that curved screen doesn't come cheap. The Note 5 is the most expensive by far at $349.99. All these deals are valid for the rest of the day or until supplies are exhausted.