HTC EVO 4G SPRINT Rebate

[josh90265]

I just upgraded two(2) of my lines on a family plan to EVO's with the $100 mail-in rebates on both of them. I was just reading through the Sprint Rebate Requirements which states you must:

1. "Activate your new device(s) with a two-year agreement on each line of service by 9/25/10"

And also to...
2. Include sales receipt
3. Fill out rebate form
4. Rebate

I was going to sell one of the EVO's, which would mean that i wouldn't activate it on my family plan account. Now I was curious if this might void the rebate on that phone.

Anyone have any ideas??? or did I pay 299.99 for that one?
Thanks