I think this is probably about finding the right sellers than anything else, looked at some of the bits again & it is hard to believe some of what is written, one I noticed said that the bits were hand sharpened & sizes were give or take 1mm which is a huge variance lol
Guessing that a lot of the sellers buy from the same manufacturer as well going by some of the pictures, most of the sellers I looked at didn't seem to sell a wide range of bits so probably just buying what they think will sell well.
The first lot I ordered were shipped fairly quickly, waited patiently for weeks & nothing arrived, when I contacted the seller I was asked to wait a little longer which I then did, next time I contacted them they said they would re ship, waited once again for weeks & again nothing arrived. There then followed a series of messages from the seller offering me a 50% refund, their argument was that they had lost a lot with shipping twice. I ended up taking it to ebay/paypal who gave me a full refund. Got me thinking though, did they actually ever send anything at all or where they just hoping I would pay them 50% of the cost for nothing
The other ones I ordered from other sellers arrived quite quickly considering the estimated time for delivery, I should have been a little bit more careful with my testing so I had a true comparison to the other bits that I bought from a UK tool supplier
Don't think I would seriously look at buying any of these bits if I ran a production shop where time is more important from a financial point of view but as I am more of a hobby type person despite being registered as a business time is not quite so important to me