Radiator costs

I have noticed there is a HUGE price variation in radiators.
Under $200 for a Jegs universal to $600 from some other companies.
What is making the big difference? Is it you get what you pay for?
My radiator could use a repair several leaks, and I am considering an aluminum replacement, but I am kind of lost as to the options.
My Dart has a 440 with around 400 hp
thank you for any advise
George