I am sorry for being negative, but just no.... and again just no.

For god sake, it's standard parts... Are they trying to scam the unaware people?
Secondly, it's a jerk move to sell standard parts for that ammount of price. Heck many CAD software include standard parts library. Ask some friend to send you an STL model for free....
Third, unless you're printing big thread, about M6 or 1/4" bolt then you can forget the smaller components unless you do "magic". It's going to be hard, real hard with parts such as M2 or 2-56. Further, too many standard parts are just not printable right off the bat and should I say, just not possible with FDM.

Fourth, disgusted by their advertising bs in the frequently asked question....