Yeah betting on Moneyline wouldn't be profitable, unless like you said you're making a large bet. That's why you either bet the Runline, or alternate Runline. Or take advantage of Live Profit Boosts that some apps have.
Still feels like Vargas could be had in a buy-low deal, not for your best trade chip that you are trying to sell high on. Would have preferred that Twins player (I assume you probably could have grabbed a 19-year old or two in that deal as well).