1. *iPhone 6 or 6 Plus for AT&T, T-Mobile, or Verizon (Refurbished) from Groupon. Price: from $429.99. Discount: up to 31%. Categories: Apple, Smartphones. Deal Rating: decent. Store Rating: 4.5 stars out of 5. Deal Recommendation: recommended. Available Until: not specified. Thoughts: You can customize the purchase by choosing a carrier and iPhone model.