$15/week to borrow your unused phone (w/ an active number)

Do you have an unused phone with an active phone number? I'm doing a project over the winter and need to borrow another phone, and am willing to pay for $15/week or best offer.

It doesn't have to be a smartphone. The only requirement is that you can pick it up when someone calls the number.

Also, please respond with where you are in the bay area. I'm happy to come and pick it up whenever works best for you.

Many thanks, and happy holidays!