Under they rules if the wire is labeled with vape implications or it is sold by a vaping exclusive place then it WILL be restricted/controlled. Because it's intended use is for vaping. Same with batteries. If you buy batteries from Lightening Vapes or somesuch they will be restricted/controlled. Or if they are labelled as something vape. If you buy them from say Orbtronics or such they will be fine.You're being pedantic to score some kind of point.
NO raw wire that we use will ever be unavailable or overpriced.
Could vape vendors gouge on price? Sure.
Will they when it's available elsewhere for todays pricing? Not if they're smart.
"coils", whether factory heads or rolled by some counter monkey... are not what we were discussing.
However if you buy say Temco wire instead of Lightening Vapes then you are correct.
Anything sold with the intent to use for vaping will be restricted/controlled.