It all depends on your domains. Of course. What I try to do is to put all my domains on Afternic Premium Network (Fast transfer). Which means setting BINs for everything listed there. Because this is a change for me. Before everything was make offer. So when I get expressions of interest, I then fix a price and add it to Afternic Premium Network.
However. I forward all my domains to my own for sales website with a fixed price of 20% less than the afternic price. (for those with fixed prices on Afternic). The setting prices on my own website is also a change. It's going to take a major effort to set BINs on most my domains. So. Anybody typing in the domain name in their browser, goes to my for sale website. I don't send them to Afternic. If buyers ever get aware that my prices are 20% cheaper than Afternic, they have a choice. Buy at a 20% discount for pay 20% more at APN. Since this change of strategy, I have sold 2 domains on Afternic and 0 from my own for sales website. But it's early days.
So it's too early to tell if the sales on Afternic are because they haven't typed on the domain in their browser (usually EMDs rather than brandables), or because they prefer to deal with a big respected company, like Afternic/GoDaddy.
Some perfectionists might say that having 2 BIN prices is a No No. Basically I agree. But all my prices are for end-users, not domainers. Which reduces the risk somewhat, but not completely. It wouldn't prevent a former disgruntled employee, for example, buying a name, that they know, their former employee were considering. So far, I only have a couple of dozen domains priced at Afternic. It's (mostly) manageable. But I have not yet been faced with ANY sales from my for sale website, at BIN. If that ever happens. It will send me into a frenzy to remove from Afternic. I have to mindful to immediately remove from Afternic. So there is still a definite risk, which is "almost" manageable