I'll toss in my two cents here with some examples from Blade from different makers who, knives aside, are friends and have been for years. I consider myself lucky to be friends with these two since I am a better person for knowing them and their families. Both of these folks sell out at shows within minutes. (less than 6 or 7 after the doors open.)
I was able to spend some time with one of these folks about 7 or 8 months ago. I have never picked up or ordered a knife directly from him, but have a couple of his knives from second hand purchases (one of which he had a big part in with no financial gain.

). At that time, I mentioned (in a no big deal way) that if he had anything fancy that he was planning for Blade that was not spoken for to please keep me in mind. Before he left for Blade he dropped me a line saying to see him before the show started. He did not have to do that at all, even if he had not it would not have affected our friendship at all.
Another circumstance. Years ago someone made me a knife from a factory pattern (just as a guide for the type of knife) that was in my collection. I took delivery of it a Blade. His table was right across from a well known dealer.
The dealer offered me a 33% profit on the knife and I turned it down. I had become loose friends with this guy for a while over the internet in another venue (email list), but word got back to him on the offer and my turning it down. I think the fact that I wanted the knife for my collection really made him feel good and maybe the friendship strengthened.
That was the first knife of his that I purchased and now there are 6 in my collection. (One a year at Blade). I do not feel that I have a complete show unless I come home with one of his knives. I make a bee-line to his table each year. He does not sell a knife until the doors open, but if the last 6 years are an example you can bet that I will be standing by the table of this friend when he uncovers his knives. If I do not get there in time some year, our friendship will not suffer at all.
My experience, for what it is worth, is that the most important thing in this little world of ours (custom knives) are the people (makers, dealers, writers and collectors). It took a little while to actually learn and realize that. Leaving the knives behind I have come to realize that they are as a whole the finest folks I have ever associated with and I am by far a better person for knowing as many (or as few) of them as I do. Knives may have brought the friendships together, but the friendships do not exist because of knives.
There were a couple of knives I wanted that I was not able to get. No one is able to get all they can afford from popular makers at one show, but if they focus and make the effort they might be able to get one or two. The chase is part of the fun of collecting.
Over the years friends (makers, dealers and collectors) have had hands with no financial gain in many of the knives in my collection. Those knives have become a representation of those friendships. They have become more than knives and I hope that I will never be in a position of having to sell any of them. I would rather pass that task on to someone else.