Somebody just dropped Derrius Guice in my 16 team PPR league

Somebody in my league just dropped Derrius Guice in my 16 team PPR league. In a league this size good pickups are really hard to come by. He will sit on waivers until Thursday morning. I am hurting for running back (I did not take my first one until the 4th round).

Here are my running backs-
Chris Carson
Duke Johnson
Latavius Murray
Royce Freeman
Malcom Brown (just acquired for 0 FAAB this morning)

Question is-
Who do I drop, and how much FAAB should I bid on Guice?

Thank you!