What's the best price you've seen for a 64gb iPhone 6plus?? I have AT&T, but we may switch because the monthly charges are getting too heavy...I've never bought a phone without a contract, but I would check Best Buy, or look eBay over. You could possibly find a refurbished iPhone 6 on eBay for a nice price there.
I know eBay's deal of the day are pretty good on phones price wise.