Presume it was make offer so I think Sedo charge the seller 15% plus they charge the buyer a fee......
All these people that say it's cheap, brokers screw you etc etc most of them couldn't give a STD cure away for free to someone with Gonorrhea......
Very easy to say, much harder to do if they own it and have to negotiate themselves - most would not of been able to afford the domain at resale price at any rate....or they get a 25k offer and wet themselves and take it.....Once you go above 100k offers it takes some balls to turn that kind of money away.....
On top of that we don't know the sellers circumstances, purchase price etc etc.......