I think they made an error, the bike they looked at and talked to the seller was T173 and the bike that they showed being sold was F158. I'm not positive the one that sold was a sandcast but for sure not the same one.
Edit: I found the results, T173 brought $43,450 it was the second high seller on thursday, the other one that was red brought $50,000.
The one that sold on the video was ser# 1014382 and brought a sweet price for a diecast. My blue green bike is 14,100 but has a no number engine to go in unless I find one close enough in number.