The brand-spankin'-new LG G5 is certainly interesting, but its modular accessory system hasn't won everyone over, including David Ruddock in his full review. If you still want a new phone but would prefer to return to a simpler time when a leather back plate was the gimmick of the year, one eBay vendor is selling last year's model at a significant discount. The G4, with 32GB of storage and an upgraded (and somewhat divisive) black leather back, is just $274.99.
This is a new model, not used or refurbished, though figuring out exactly which version of the phone this is is something of a chore. The seller lists it as model number "US991," a variant sold on US Cellular (a CDMA-LTE provider). According to LG's website, that particular model includes GSM and CDMA support, plus LTE bands 2/4/5/12/13/17/25. That should make it compatible with AT&T, T-Mobile, and Verizon LTE, and indeed, a cursory glance at an XDA thread investigating various users' experiences seems to indicate that this is the case. It won't work on Sprint's LTE network, despite the seller's reassurances, and performance internationally will be spotty. In addition getting over-the-air updates without a US Cellular connection may be a problem, and advanced carrier features like Wi-Fi calling and VoLTE may not work on other carriers.
Standard shipping is free to the US, and buyers outside of New Hampshire shouldn't have to pay sales tax. The seller says that it's shipping "worldwide," but your mileage may (literally) vary.