I also got a call from them, mentioning one particular domain I'd recently acquired. I then offered it (as they suggested) through one of their "guarantee" auctions ... but no bites yet.
It's a shame - they seem like hard-working & well-intentioned folks, but their daily auctions are still an endless stream of dreck. Today's list is typical; nearly 300 domains for auction, and there aren't even 5 that I would register if they were freely available (apart from a handful of LLL.us domains for which the "Bido price" is $99).
You can't blame sellers for not putting good domains there; I've listed almost 50 domains, of which only 1/3 have sold, and most of those were at the minimum $28 price. I'm not sure how to solve their chicken-and-egg problem (better domains won't be listed unless many buyers come, and many buyers won't come unless better domains are listed).