I would take him straight away. Might be 37, but still knows where the goal is. Maybe he wouldn't come, but I would give it a go.
Dont need him. He isnt a striker anymore, basically he plays Huddlestones role and just distributes it from the back 4 up to Bradely Wright-Phillips. Hudds is a better player now than Henry is plus Henry's attitude is god awful 90% of the time, we dont need that in the clubhouse. Anyway he is retiring by all accounts and is going into a coaching role at Arsenal.