T-Mobile pays the resellers big commission for getting existing customers to switch to the costly Even More plans and Staples is refunding some of that commission back to the customer.
If you find out that Staples will leave your grandfathered voice plan and your Total Internet plan alone and still give you the phone for $119, please let us know.
I see that wirefly.com now has option to keep existing plan. (They used to require upgrade to Even More). Here's what their terms say:
[I]If you’d like to continue with your existing T-Mobile service plan, select this option. As long as your selected device and current rate plan are eligible to be upgraded, we’ll provision it the same as it is today. If any modifications are necessary, we’ll contact you before we make any changes.