How about something along these lines? You upgrade from Britton to Janssen and add Chapman for a marginal cost difference of $27. If we assume Chapman's probably worth $25ish in the auction, that means you're getting him for a fair price without giving up any talent, and paying $2 to go from Britton to Janssen, and losing nothing else off your roster for the right to make those RP upgrades. I clear cap room, which is probably more necessary for me than adding talent right now.