Reported values fluctuate, as Trout cards are on the rise. It changes almost daily. Not many sellers listing his early cards, as they are holding them, speculating a meteoric increase.
I have been watching this guy on YouTube that is a trader (stocks) and by night as he says invest in trading cards. Not sure if it’s the trout rookie but, says he will buy a couple of cards and sell the few of them when they are at their highest. He has also stated that after he gave his option the cards they go up.
Yes, there is profit to be made. I do much the same, buying large collections and selling off some of it to recoup my investment, while keeping some things I like for my personal collection.