Just in case anyone is like me and bought your phone off contract at Best Buy they will price match Amazon.com's price for the Sprint SGS5 off contract. I originally paid $799.99 however it's $699.99 on Amazon. I just returned from Best Buy and they put $100 right back on my card.
They said they cannot price match Sprint's off contract price of $649.99 because the price is indicative of their "Easy Pay" plan, but I was still very happy to get $100 back today, just thought I'd pass this along.
BTW: Also got Best Buys cell phone insurance and dropped Sprint's; was very impressed with the coverage as well as the costs ($199.98 for two years of coverage and you save $40 if you pay it at once like I did)