Biggest trade on sythe?

[MMOExchange]

I'm curious as to what the biggest trade on record here. I think I read somewhere that n4n0 or someone spent like $5000 on one trade. Not sure who though . So what was the biggest trade recorded?

 

[Punkerpunk13]

I know of numerous 25B+ trades.

 

[stui]

i think video did a 100b trade spaced out over 4 days