Depending on what you buy, you'll want to make sure the filter has the box truck logo next to it. If not, shipping could really kill the deal.
Many here have had so many complaints about receiving old (old old old... old) stock from RA so that'd be another one of my concerns.
I will say we never have any RA cheap filter success stories either.
My cheap go to filters are anything Fram or ST (ecore) that I can source locally. WIX made Pro Select or Silver also depending on the application.