Good advice, but domains that are 1/8 of that caliber take a big capital investment these days. The dynamics have changed, instead of having a .co .net or a .org, first time sub 500 buyers have 1000 other extensions to choose. The high end buyer wants the cream of the crop, and many end up paying for it, but with scripts, and bots automating aftermarket deals, it is very hard to get a decent price without throwing out a whole bunch of money, and hoping it comes back one day.
Nobody said domaining is easy, actually starting from scratch today it is extremely hard with the number of people chasing the same drops, good inventory can be hard to accumulate without knowing, a few ins, and outs, and have confidence to hold. You also need lots of capital to acquire, and renew. WIth Huge Names catching anything decent that drops, you basically have to spend $69 to acquire single bets, that may, or maynot pay off. 10 names is like $700, without any guarantee of a sale, even if you sell one for $500-$1000 with a 20% commission you are just breaking even.
Not everyone is cut out for this, if you are buying english speaking domains, and english is not your first language, maybe not a good idea.
The industry will keep supporting, and putting figures out there because they need people to buy the crap, park the crap, attend the conferences etc... sell the dream, just like any other industry.
If it's not working, maybe time to try something else.