Wealthy buyer does not mean big spender on domain. You have super wealthy people that will spend 250,000 dollars to fly their family out on a private jet to some vacation spot, just to see them cry like babies when they are told WIFI is $25 per day per user.
You must understand the wealthy buyer type, who they are, what kind of people they are, they are not all the same.
Some are buyers that will spend all the money in the world for the crappiest domain only if they know someone else is about to buy it.
Others will only want a domain that they think you refuse to sell.
Others will only pony up big bucks if they know you are filthy rich too.
Others will give you 1 million for a name only if they think you paid 2 million and you are taking a major loss.
Others will only give money if you challenge them and make fun of them and say "stop dreaming, you cannot afford this name, get lost, I don't deal with dreamers, I deal with spenders who buy what they like especially the best of the best in domains".
Everyone favorite wealthy person is the superstitious freak. This is the rich man that believes in various superstitions, from certain numbers to days of the week that are good for business or bad for business. They usually all have one thing in common, they believe everything is happening for a reason and some magical power is guiding them into amazon situations. This freak will sell his left testicle to buy your domain if for example the following happens:
He emails you and you reply: Pretty interesting you are emailing me now, this name is part of a live exclusive auction that is starting in XX (minutes, hours) you can dial in listen live and bid, or if you are in the Seychelles area (some area he cannot possibly make it to feel free to spot by the whatever hotel (some 5 star place) it is in the main ballroom, I can put your name on the guest list. For privacy we are not broadcasting it live however you can dial in and place bids, call some 800 number.
Now he feels that his magical charms and divine guidance have made it so he contacted you just in the right time, he feels this is a message from god(s) and this is all meant to be. When he dials in and he will simply have noise in the background, speak like some euro auctioneer and act as if there are other bidders chasing the name, he will go up to numbers that you will not believe, make sure you don't burst out laughing or crying or a mix of both.
Watch this to get an idea
I am not suggesting you go and study the type of wealthy person who contacted you and social engineer anything, the above was simply an hypothetical example to explain that not all wealthy think the same. I hope this served as some entertaining reading for you