Even though I already finished the game, I played a bit more because I hadn’t been able to buy the two plants I mentioned before and I wanted to see their versions lol. Now I understand the pricing better— the more plants you have and the more grown they are, the faster they give you items. You can sell those and earn more money, which makes it easier to buy what you need. Even so, I still think the prices might be a bit high at the beginning, Maybe as you get more plants and they grow, the prices could increase too, Or maybe there could be an item in the shop that helps plants grow faster, so the current prices can stay as they are (I saw that idea in a comment here). Still, the game is fun.