As a side note, did you look closely at Daryl's photo with the bow? That's his new Stryker Strykezone and bolt package that Michonne picked up for him during last week's firearm shopping spree..........
At the end of the episode, just prior to loading up the vehicle, you see her walking out from behind a building carrying a bunch of stuff along with the new crossbow...........I think it was meant to be his Christmas present.
That's not a cheap bow, she likely maxed out her credit card on that one..........LOL!
Added.
What was wrong with his old crossbow? I was actually thinking about getting one.