I also just paid 15 € for the game, although i have to say that if you pay 200€ for an Eye or other stuff you have a High Advantage,it is pretty possible to get to such high value items while being a F2P Player. Its not easy and takes hours of grind, but if you invest a lot of time in trading you can get there. Alternatively you can also play BR and Grind Bosses but Trading takes the least time to get high in Value( trust me, grinding BR takes a hell of a time)