I contacted them with a list of domains, some of which I had offers for, in order to gain more 'exposure'. They denied every one of them, even them ones that had some 55+ bidders when I purchased them at auction, and most with over $5k offers on the table.
Overall, they perpetrate themselves to be some kind of 'brandable' authority.
Here are the facts; any given domain can sell for over $5k+ on any day. It just depends on how 'in demand' it is. You want to find a brandable domain, ask yourself 'does it sound good' if yes then congratulations you are a brandable expert at the level of BrandBucket.