Welcome to the DIS!! One of the things you'll find repeated here a lot if you stick around is that trades are very subjective, as in what one person thinks is valuable some other person may not value at all. So as long as both people put up items that they thought were fair and nobody pressured the other person to trade against their wishes, then be happy for your trade. For all you know the person had 100 tiaras and knew that you wanted one and wanted you to have it. So enjoy your tiara and welcome to the DIS!