If you go to the Verizon store or look at their website you can find free phones and then some that cost money but they all come with a contractual agreement. So the price varies and you must choose a plan as well as purchasing the phone.
Every phone costs different on the contract. Check with the Verizon for the prices. Free phones are also offered by many carriers on contract. Check Verizon's website for further details for both the matters.