Sales waypoint fix

Finally got sometime to fix the sales waypoint. Several users want that fixed fast but I just don't have the block of time for it.

So a first look I found my toon find a random NPC instead of the repair guy I recorded . What happened is the javascript property was not auto refreshed when pass in and I need to initialize it explicitly. It does make sense that the property will have its previous value, but the actual implementation of the property is just a passed in variable that has to be set to whatever the internal implementation is, and I was assuming the variable is random and is initialized to NULL. Now everytime I have to make a new empty string and pass it back...