Serious question though, why? It’s not like they offer a ton of apps. It’s not a real app store, it’s effectively just a launcher for the 3-4 apps they have.

Directly through the manufacturer. Most offer trade-in promotions on par with, if not better than, any service provider deal, with the added bonus that you’re not locked into a 3 year installment plan with said provider.

Alternatively, eBay.