GoDaddy's domain buy service is relatively similar to others in terms of structure. In most cases, buyer brokers take a percentage commission based on the final acquisition price of the domain. However, for some buyer brokers, that commission structure is on a sliding scale based on several factors such as the difference between the domain's listed price versus the ultimate acquisition price - each buyer broker has their own structures that work for them & their clientsI wonder how well they will negotiate for you, being they get 20% commission