I have only one ignition key and need a spare. The dealer price for a key ranges from $85 to $175, plus $15 programming fee. Can I get an ignition key that works cheaper than that?

Go get 2 non transponder keys cut at
the hardware store for 3 bucks each.
Get a universal bypass module (key-in-a-box style)
at www.REMOTESTARTCENTRAL.com for 25.00
Then wrap the coil around the key cylinder,
secured in place with hot-glue..connect the
status input wire to chassis ground and the
positive to ignition...no more transponder
key required. No dealership will program
a key to a non matching VIN ECM.
Besides, the total cost on this is
substantially less than what a dealership
would charge.
This is what will work instead of the dealerships
profit margin, and the rest of the security will still work other then the engine immobilize. Good luck and keep this in mind to think about it.