Just a quick moan:
it seems that selling code that uses GPL'd modules is justifiable because you are doing just that, selling the code that uses the modules, not selling the modules themselves.
There's nothing wrong with selling GPL'd modules: the GPL does not state that you have to give software away for no cost, only that you must make the source code reasonably available.
The other nit, why are you worrying about having to supply a copy of the GPL? You can't inform a user of their rights without giving them the licence: this isn't GPL specific; the same applies with any other licence.