This is one of the stupidest, most disrespectful, attempts to profit based on something the guy clear knows nothing about. In general I disagree with criticizing ludicrous high prices on the EE, as the stupidity always takes care of itself (by the item not selling), but this is different. It is a village idiot's attempt to try and profit from a tiny bit of knowledge of someone else's culture.
It is internally contradictory. That is the main thing. Every Chinese person in the world would recognize, implicitly, that the path to "fortune/prosperity" does not lie in being ripped off by people with a tiny amount of knowledge about your culture.
Cantonese numerology (which is what we are really talking about here) is based on the idea that certain numbers sound similar to other words in Cantonese: 2="easy", 4="death/suffering" (unlucky), 8="fortune/prosperity", etc.
In other Chinese dialects, the meanings can change, as the words for numbers sound different. Pairs, even numbers, and 8's tend to be lucky, but so is 168, and other things.
The main thing though is, no one - anywhere - Chinese or otherwise - is going to pay 3 times the new price for a "well used" anything because of its serial number. It is contrary to logic and much as to Chinese culture - which is highly frugal, similar to the stereotype of Scottish people in the West. I know, as I'm married to one (Taiwanese). Sure, she think's 8's are lucky, but that is dwarfed by the desire not to get ripped off.
The seller must have serious financial pressures, but this isn't going to have a sniff of a chance of working.