A lot of people would frown upon profiting and try to steer you away from this practice, is it risky HM a little, have people lost money trying before? No doubt. You're only going to profit by keeping your ear to the ground and finding the opportunities.
You have to be diligent and not make wild speculations or you could lose money due to depreciation if nobody wants what you bought, if you're really interested in making money see my first post it's fairly simple economics but not necessarily easy, a difficulty you might run into could be a seller opens up a pre order but restricts the quantity you can buy, so maybe you can multiply your money but not by many times.. are there other safer investments that are more attractive? Sure.
I'll give you an example of a potentially profitable deal.. Never Summer will release a limited number of exclusive Spyderco Native 5's and you must send some sort of proof that you're a firefighter to buy one, the Native 5 while maybe not the #1 selling Spyderco does have probably a rather large following not to mention collectors.
So you have scarcity coupled with demand, do you think people will be paying a premium to get their hands on one? You bet.