I have a used "Benchmaster" end mill that I got for $200 a while back. Heavy cast iron, made in the USA. It will cut steel if I go slowly - but I use it all the time for brass and aluminum. I make locomotive mainframes, modify cylinder blocks, machine siderod masters, cut windows in passenger car extrusions, make small parts for old aircraft - it is quite heavy, and one of my better purchases.
As to Harbor Freight - that small cast iron drill press is superb, and a "steal" - I have three at home and one in each hangar. Decades of practically daily use!
I agree - a lot is junk, but there are some gems in there. My "Dremels" come from HF - $9.95, pitch them when they break. Never had any luck with their sprayguns - I recently graduated to a Croix HVLP, and love it!