I've been trying to purchase only a race or any singular item but all the forums I've seen and tried to follow them but none of them work. They mostly say to go to marketplace, find the sourcebook (or whatever they're called) that contains what you want, click it, and scroll down to a menu that lets me buy a singular thing but I don't see that so am I doing something wrong or what

Hasbro is greedy and now they own the site. So they took all individual purchase options away.

Ah, thanks telling me, that sucks though