My personal opinion is that it doesn't feel right to see it done on this particular site. By all means, people are free to do what they want to with their money and knives, but this is a community of sorts and some of the same people who buy up Sprints in order to make a profit off of this community are the same folks who found out about those Sprint Runs from this board. Also, some of those same folks are the first ones to ask questions if they need something from this site.
Just sort of feels like $#!++ing where you eat to some degree. Not that I'm accusing anyone of doing that, but I've seen a few members who post a question about an issue they're having and 10+ folks chime in to give them all the help they need (for free). Then I see that same person post an inflated-priced Sprint run in the Exchange shortly after (and do it again, and again, and again...).
Don't get me wrong, I'm OK with the market changing and selling an item for a higher amount to adjust for the market, but when you attempt to drive the market by purposely inflating a price (and buying multiples of a knife based on a pre-order that you found out about from this site... and don't contribute to the community as a whole), then it's definitely not the same thing. As far as I'm concerned, go do that on eBay or some other site that you don't depend on for news, info, and support of your knife habit.
Like I said, you're free to do what you want and there's no rules against doing it, but I wouldn't personally do it.