You must be high as a kite! Why in the hell would someone pay you $550 for a board that can be had right now for $335 on sierrasnowboard.com
?! Sure, I'll pay $215 more to buy the board from a private party, have no proof of purchase, and thus no warranty.
Why would you be selling it right after buying it anyway? Probably because you bought it off of sierrasnowboard yourself and you're trying to make quick cash off of a sucker. Well, you're not gonna find your sucker here.
BTW, retail price on that board is $560, so you're actually offering $10 off retail.