Jim, This is one of those questions where you need to know what competing homes are offering. If they all have updated neutral kitchens then updating your kitchen might be a good option. On the other hand, if none of the competing homes has an updated kitchen and you pay a contractor for all work, you probably will not get a 100 percent return on your investment.
Decrease the price of your home XXX dollars and market the home "as is"
Get 3 estimates (those are free) from local companies. You would then be able to place copies with paperwork about the home while selling and offer XXX dollars from your proceeds (the buyers money) be placed in escrow to be used for remodelling of the kitchen by the new owners.
Your agent would know how to word the listing to protect you from an extremely low offer.
Before doing anything other than getting some estimates, I suggest you either interview 3 local agents or have a not for refinance appraisal done on your home. It may be that the numbers you get will be in the 325K range. (just throwing out an extremely low figure) and it may be to your advantage not selling. Better to know in advance.