Board Thread:Questions and Answers/@comment-189.174.168.244-20151016040210/@comment-1308242-20151016041553

My suggestion? No, don't buy any space for cards. Find another vehicle that you can dump some cards on if you can, or sell cards that you have more then 10 of. I usually like to keep 5 or 8 of each card if I can. DO NOT sell Engine cards, DO NOT sell Tech cards. Now unless you're trying to pro something from S class, I usually sell my S class cards first, this is because S class uses many Mid-Techs and I don't usually race S class because of all the boosters in multiplayer. Though I do recommend Max pro'ing at least one S class vehicle for grinding in Beyond or Car Mastery. If you have the funds, a good place to dump off Pro Kits cards would be the W Motors Lykan HyperSport, just make sure to have some F6's and Advanced techs on you, other then that, it's actually really easy to max pro.

That about covers it!

Happy racing! (I need a new catchphrase...)