>>40566665base set shit is worthless, if you really want to "invest" in this hobby you're better off going for Gen 2 era foils/sealed product since that was when the franchise wasn't at it's peak in popularity. also the cards actually look cool and aren't just Sugimori art over abstract backgrounds.
alternatively you could just enjoy the fucking hobby, keep your cards in perfect condition, and maybe somewhere down the road your Lillie full arts might be worth something :))))))))