In the US, selling pre-funded or maker-funded coins is a big NO-NO. This applies to businesses who operate or have a business address within the US.
From what I know, it is considered to be money transmission and unless you have an MSB, FinCen and the goverment frown upon this.
There is nothing preventing a buyer from funding their own coins. This is nice and legal.
No righteous physical crypto business would want to risk themselves by directly selling a loaded coin to a customer in the US.... there is one I know that will, but that is neither here nor there

Thanks