I didn't think much about the subject one way or another until I went to a prestigous knife show in Calif. a few years ago with the hopes of getting a very nice folder from a particular Mastersmith that I knew would have a table there.
Well, I got in the doors with the very first group of fifty, and went straight to the particular makers table only to find that the Mastersmith had brought only 3 knives, two folders and one bowie. The folder that I wanted and the bowie both had a "sold" signs by them. Without great enthusiasm, I bought his remaining folder, and while it was nice, I really bought it just to have a knife in my collection from this great maker.
Upon my return home a few days later, I discovered the folder that I wanted with the "sold" sign next to it, had been "pre-sold" to the large dealer that was hosting the show! I discovered this from seeing the knife on the dealers website for sale for $400 more than the maker had it listed for sale! Now if I wanted to buy it, I'd have to pay their jacked-up price plus $225 in Calif State sales tax!!
So my pesonal opinion now is that pre-sales should not be permitted.
*The opinions expressed above relfect the views of the author; If you have a differing opinion, the author really doesn't give a rat's ass.