I think it would depend on a vanity purchase, or some kind of rush buy (to avoid grinding, as stated before)
I could see somebody paying $5 to get 10k for base building, if there wasn't the issue of having to then grind for the materials.
Same goes for ew builds, say thieves are nerfed and there's no easy access to mfc. Somebody might pay $5 for 5,000 mfc and 10 laser rifles BUT on top of that you need a character leveled to 18+ to be effective. The fact that's there's so much 'combo' grinding required in this game makes it a hard sell. It wouldn't just be a $5-15 purchase, but a $500 purchase to get all the alts and resources required.