Originally Posted by AstralBlades
You're paying for the parts themselves, not the synthesis recipes. So no, you don't need any materials at all - you just need to purchase them.
Also, some of the parts come in multiples. You can figure out how many you'll get by comparing the number in parentheses with how many you already have. "Blue Crate (20)" for example, means that you'll get 20 blue crates for $0.99.
The colored crates are good for making enlarged-pixelated art.
Yeah, but other than that, the crate is pretty worthless. I bought those pink crates and it pretty much started taking up spaces, so I had to keep on moving them again and again. They look super cool though. The fountain, on the other hand, was a piece of shit lol
Also, when you buy those Job parts, the ones you have bought will be grayed out, but right below it will be another duplicate of that item. It is also not advisable to buy the same part more than once since it will only give you a small-than-listed increment on your stats.