my primary line is already going to be extended for 2 years because of the iphone 4, might as well upgrad the other 2 right?
Okay... so let me try to read through the (blurry) lines here.
You are on a family plan. There are other members of your family who use those phone numbers.
They have upgrade eligibility, but don't want to get new phones.
You want to upgrade their lines (extend the contract for 2 more years) and buy iPhones that you can turn around and sell on eBay.
Am I right?
Well, why are you having to buy them for 450 dollars?
Would they not be 200 or 300 (plus tax, depending on size of phone)?
If you aren't eligible for full upgrade pricing, why on earth would you upgrade?
I mean, if you buy for 450 and sell for 600, you have to pay fees for eBay, go through the hassle, the shipping.
It's not worth the trouble.
Then, what if one of your family DO need a new phone (they lost/broke theirs)? They'll be shelling out full price for some phone (possibly, depends on whether you have spare GSM phones lying around... I know I do).
Eh. Not worth it. If you were say, buying for 200 and selling for 800, maybe.
But with such a low profit margin, I'd not waste my time. But, that's me.