I firmly believe that, when it comes to domain names, IF your goal is to "bring in the bucks" THEN it's UP TO YOU to identify and attract the attention of those ENDUSERS most likely to be interested in the subject matter of the domain. Otherwise your only bidders will be bottom feeders*, that is, those looking for domains selling significantly below what the bidders believe the domain actually is worth and likely to sell for . . with a little more effort . . than listing it at the auction site they are bidding at.
An online auction system is merely a bit of software that enables individuals to place bids. It does nothing to accomplish what I first stated. You want to bring in the bucks? Then YOU have to identify potential endusers, the VAST majority of which spend NO time searching for "the latest auction that might be of interest". YOU have to reach out to those potential suitors and bring them to the table, i.e., the auction.
Chose ANY bidding system. Just search "domain (name) auction(s)" or "domain aftermarket" and the like. Heck, you could set up your own domain auction system using something as simple as Wordpress: have people register, post the domain, and then have people "reply" to the post with their bids. You might even use Twitter or Facebook or any other service that allows people to register and post. Arrange for payment via an escrow service.
Try any and all platforms but don't think that's the answer to "bringing in the bucks". You will likely get offers on any platform IF the domain is solid AND you do a bit of promoting on domain venues. However, that will likely get you bids that reflect the bidder's judgment that they can grab the domain on the cheap and do a better job reseling it . . ergo setting a minimum bid can be important if you don't want to be disappointed.
Dig through Elliot Silver's blog to glean insights into what he has done in an effort to indentify and connect with potential buyers the the domains he snares.
Nexxxxxtttt . . . opinion.
P.S. *Regarding my use of the term "bottom feeders" - I use that phrase in its most genteel and kindly sense as many I know, including myself, would fit the definition. I use it simply to drive home the point that auctions that are not well promoted get results . . in the 5-10% of likely enduser value . . or less. Could be slightly more in the case of domains where the potential for a quick flip is in play . . but, again, you are dealing with knowledgeable players who have done some homework . . years and years of homework.