Hi, great sale for a .info - ironically my largest sale has been a .info although in volume more .com's sold.
What is your strategy in terms of (a) registering domain names (eg hand reg) and (2) selling them?
I started by registering a dozen and buying like 2 - 3 domains for more than reg.fee, but still in low $xx. After I realised there is an actual aftermarket for domains, I sold what I had at the time, bought few more, regd few more, and it's been a long distance run, but my domains have been slowly selling over the time. After some time, I improved my taste for domains, and I was buying and registering more. In numbers, my handreg investments were yielding ~500 - 600% profit. Even though these figures were nothing for old time domainers, it was great for me. Also, had some luck with liquid domains (LLL.net, LLLL.com etc.). Last year I changed my strategy for a last few months, when the chinese premium goldmine started. I've been able to flip ~20 in the beginning making around $15 - 20k profit in a month, which was really cool and helped me a lot. I am domaining full-time since September 2015 and now I quiet focus in ccTLD of my country, while still being active in gtlds (not the new ones),
To answer your questions:
a) I do some automated searching for domains. Since I have background in computer science, I am able to do my own stuff, and automate it a lot. It makes a whole lot of work for me (that I wouldn't be able to do even in 8-10 hours a day) in a few minutes/day, so I just check results and register what I like.
b) I don't do outbound, so for me selling is all about maximising exposure. DNS, Sedo, Afternic, GoDaddy premiums... Getting your domains in front of your buyers is the key, imo.