All domains I sell on my marketplace NameCape.com (very promising and upcoming) , from $1000 upward, I give buyer the options of using one of 3 different Escrow services:
DN.com
Escrow.com
Payoneer escrow
If it is low fees you want, no on comes close to the low fees and great service of Transpact.com.
They handle many domain payments through their escrow service every day, at prices no one else approaches.
[Disclosure - I work for Transpact.com - but it is a great company]