You get $200 for IP 4's and up, and $300 or so for 5S as long as it turns on and the face isn't broken. Bring it in and they will issue a virtual "gift card" that you can use on anything Verizon.
But, still looking to find out about IP6 purchased at Apple and not VZW.
I did order my phone through Verizon on 9/12 (arrived 9/26) but didn't see the point of trading my 64GB 5s... I skipped the Ebay fees and went straight to Craigslist and it sold for $450.