In my opinion, the actual value of the card isn't as important as the personal value. For a LeBron collector, the trade probably be worth it to receive it but not worth it outgoing. What I am saying is it is important to collect the things you are interested in as you will find you enjoy it more and have more sentimental value to your collection, at least that is the case with me. If it were me, I would like the LeBron Auto, but I am not big on soccer or baseball, though I know Trout is one of the hottest players in the MLB card market and Messi is one of the better players in MLS. Tough decision, but I don't think you can go wrong either way.
Matt Kenseth card collection is nearing 50% with over 2300 different cards. Always looking for the missing remainders to get to 100% completion.