Does it have to be Verizon? If you're just looking for a cheap placeholder to get you by for a few months, your best (cheapest) bet is to get the LG Optimus V for Virgin Mobile.
It's only $150 band new and Virgin has some pretty cheap plans, with no contracts.
You could port your number to Google Voice and just have it forward everything to whatever phone number you get from Virgin.
Then when the new iPhone comes out you can get the new customer price.
That LG phone isn't that great, but it should get you by for a few months at a dirt cheap price, with no contract, if that is your goal.
https://www.youtube.com/watch?v=oL0KT-jIKm8
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