The worst that could happen is they block and trade, or maybe turn over a Sage-Eye Harrier and you get a stalemate
I dont doubt that certain people on the secondary market may have less-than-pure intentions when collecting these cards, but if you want to see a sexualized Lillie, youre probably buying a doujin and not a full art trainer card
While Sigarda might not do anything splashy like other commanders here, she does offer a level of consistency that comes with kindred-based decks and the ability to craft your next draw however you like
Simply take a picture of the card you want to sell, and enter it into the search
The benefit here is that you place one +1/+1 counter to ensure that at least one of your creatures won't get bounced back to your hand
The remaining four cards are promotional reprints of Tatsugiri, Buddy-Buddy Poffin, Arven, and Pokmon Center Lady