How did you lock it in till october 1st? I just did my iPhone 4 16gb AT&T and it says it is good until the 23rd, I don't get the new one till the 21st so i'm hoping that if I mail it on the 21st it will get there in time...
I think there was some confusion about the dates. The e-mail you receive after you accept the offer shows a date of October 1st. I'm pretty sure this is the correct one.
I sold my iPhone 4S 32gb for Verizon for $300. iPhone 5 32gb cost me $322.92 with tax.
$22.92 for a brand new iPhone, ftw.