I took a look at your trades list, and if the pin is which one I think it is, I would consider the LE size and the price more than trade vs wants. "Specific cruise" cruise pins have a limited number of people wanting them. Pretty much people who were on the cruise but didn't get a pin, people who collect all cruise line pins. But it doesn't have a specific character on it, to reach a broader audience. If you compare it to the pins on previous TA cruises: [pinpics]54910[/pinpics], [pinpics]56691[/pinpics] the number of people having the pin for trade could likely end up greater than the number of people wanting. This one has a lower LE than those, so hopefully that will help. I would be more worried about other traders trading to the few people who want the pin, and then not having anyone to trade with in the future, then trading it for too little of value.
For a more general case, I would ask some questions like "Does my pin have a wide audience or a small one" Certain characters can really help in that regard : Tink, Stitch, Princesses these days. Also, "Was my pin difficult to get?" For example, my Dad had a pin that only he was trading. It was a pin that was awarded to merchandise CM's in one land of the MK. So he traded it for a vintage pin that he had been wanting that not very many people were trading.