Having been at all three thus far, having seen it all

Question

Bangalore: A familiar face at IPL auctions, having been at all three thus far, Richard Madley, on the eve of the fourth, had the look of having seen it all. It didn't in any way stop him from being really excited. "This is the pinnacle of auctions, not just cricket auctions but in the history of auctions," gushed the professional auctioneer from England, whose family has a long tradition of bringing down the hammer, although by his own admission no one else has done it with real people involved as the objects.

Please explain to me the highlighted parts.

Source : Mumbai Mirror

Clive · Accepted Answer

Hi,
Bangalore: A familiar face at IPL auctions,
having been at all three,He was in a situation where he had been at all 3 at times in the past.
thus far up to that point. The implication is that he may go to more.

Richard Madley, on the eve of the fourth, had the look of
having seen it all. He looked like he had seen it all
It didn't in any way stop him from being really excited. "This is the pinnacle of auctions, not just cricket auctions but in the history of auctions," gushed the professional auctioneer from England, whose family has a long tradition of bringing down the hammer, although by his own admission no one else has done it with real people involved as the objects.

Please explain to me the highlighted parts.

Clive

User_gary · Answer

Thank you Clive.
I'm here can't understand the use of "at all".
What they mean by "have been at all" and "having seen at all". Moreover what the number 3 refers to?

Please help me with this.

Clive · Answer

Hi,

Consider this simpler example.
There was anmeeting last Monday.
There was a meeting last Tuesday.
There was a meeting last Wednesday.
I was at all 3 (meetings).
ie I attended all of them.

Clive

Having been at all three thus far, having seen it all

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