In my experience, it is easier to sell brandable domain names on BB than on your own separate site. Previously, I had most of my names listed solely on my personal site and the sales rate was about half of what it is on BrandBucket.
I've been mostly buying hand reg'ed names for BB. I think it's a smart investment, but as many experts will tell you, domain age matters. I'll say it again, domain age matters. That means if you are hand reg'ing names, you may have to wait a while before the names become profitable.
I know that Estibot info should be taken through a filter, but I believe that Estibot is a useful tool if the info is taken through a filter. I've watched many of my hand reg'ed names go up in value over time. Many of us who have BB portfolio's full of new domains should be patient and let our names age out a little like a fine wine. The names should be valuable down road. I am not 100% sure each name will be worth more as time goes on, but I do have plenty of money riding this theory and I know that my older names sell better.