This is my skeptic self responding to your plea for help.

Part of the problem with buying things especially online, is that you cannot even rely on the description being accurate. The trust is gone. Too many online sellers have learned that it is too much trouble for consumers to return things, so they don't really care if they sell you junk.

I did purchase a set of center drills from Amazon for $14.00, 2 years ago. They have been working fine so far. But I have only used them in some mild steel and aluminum.

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1