No idea, I guess I'll know once I figure out what I am training next. If you need the Aero soon you can take it on credit for now and I'll take the TMs later once I know what I need.
I have some untouched one's actually left over from the gym's old days, I'll get back to you on what TM's I need (I have unlimited Star Pieces on Emerald so no need for those :))