Also stay away from CSF copper brass radiators, tend to leak. Fix one leak, another pops up. One ends up re-soldering every seam on the radiator.
I suggest you buy local, one having a life time warranty.
If not ask the shipper to pack the item beyond its original factory packaging. The factory packaging is good enough for bulk shipping to the reseller but not for UPS/FedEx which tend to bounce the product around.
The result is leaks.