As this site seems to now have adverts for Aliexpress then I can’t see why I should not mention the Xuhan brand ones I have been buying via them. They have gone up from the £2 I was paying for a 6mm cutter a couple of years ago to about £5 now but still a reasonable buy for general use coated for steel and uncoated non ferrous cutters.
APT have always been cheaper than ARC on the small sub 6mm sizes so I use them too plus they do 3-flute that Xuhan don’t do many of. Between the two it’s hard to see a difference in performance and tool life. They
https://xuha-cutting-tool.aliexpress.com/store/5041252?spm=a2g0o.detail.0.0.b381SEUDSEUDZc