my inbound sales rate is about 1% > 2% per year
but the amount of each sale can be more important, that percentage of sales from one's portfolio
as one person who does outbound, may sell 50 names a year, but average sale price may be $100 or less.
while another, who only does inbound, may just sell 5 names in a year, but their average sales per domain may be $1,000 or more.
in that example, they both may earn same amount, but one works harder for their money than the other
the outbounder has to speak up, for his names.
they have to write emails, make phone calls and try to convince buyers
while the inbounders' names, speak for themselves.
so they only have to negotiate with that interested potential who contacted them out of the blue or orange.
imo...