Theo has said they want to get 5-6 prospects in total for Garza and Dempster. So if you give up Bard, Lars, and Brentz. Or Lavarnway, Lars, and Brentz, you could definitely pull Garza.
I think you guys are going to be very, very surprised at what the Cubs get for Garza.
And by the way, if you don't think the Cubs would pounce on Bard + Lars for Dempster, you're crazy. That would be a complete overpayment for Dempster.