You are looking far deeply into the stats, you have to look at a lot of things when it comes to stats, not just how many sold out of the total number listed
Name quality
prices they sold for?
Price they bought the name for?
Where else were they listed?
are they keyword or brandable names?
How long have they been listed? Some sit there for 10 years before they sell? Are you willing to be that patient, you might have to be with hand-registered names
If you want to make money in this game, a better strategy would be
Research some good names in a niche you know
Dont hand-register names for $10
Find the names that will sell in that niche, get the best keyword names (not names you like the sound of)
Email the owners of the names and make an inquiry
Bargain them down as much as you can
Rather spend $250-$500 (or more if really good quality) on a decent name than buying 25 hand-registered crap names
Research potential end-users
Dont just email the first email address you find on their website or the WHOIS address
Find the decision makers at the companies using bloomberg, Yahoo Finance, LinkedIn, google and loads of others
Email them and see if there is any interest
When you make sale, invest that money and buy more quality names sand repeat