I used to have several items, but have shared them with others over the years. I do have the following...
a little bust of Mr. Data that I purchased at the 40th anniversary Star Trek Convention in Las Vegas
an andorrian bobble head that I aquired from the Sci Fi museum in Seattle
a little Hallmark Trouble with Tribbles ornament that drops little tribbles from the top
& a set of original drinking glasses (featuring Kirk, Spock, Mccoy, and Uhura)