I'm not sure pressing the buy button first guarantees you the sale. I wonder how that works. Is the buy command time-stamped, and if so what is the reference for the time-stamp and is it used for establishing purchase priority? Or is the priority established by the arrival of the buy message into a FIFO?

You can see this shit is really complicated and it's a wonder we can buy anything online at all!

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated