RE: returning an ARF,,,
I would say that "yes", you should be reimbursed for the initial shipping. Thats the right thing to do. It's the stand-up thing to do.
But, good luck getting it outta them. No matter WHO the company is--you're going to have a pretty tough time convincing them to give you back the $39.
I'd just chalk it up to experience and consider yourself lucky that your ONLY out $39--and not much, much more.
There's just some things that aren't worth your time to fight over. $39 is a drop in the bucket compared to the $$ we spend on this hobby.
I DO understand your point. It's the principal of it all. Why should you be out $39 because they sent you an inferior product that had to be returned?
But, it's just not worth fighting over and it's certainly not worth loosing sleep or flying time over.