Winter Park is probably your best bet for antiques. If you want memorabilia or other collectibles of this nature then Notable and Notorious at Lake Buena Vista Factory Stores on SR 535 is a good place.
Actually, Hubby and I have never been "collectible" shopping before. In fact, I'm not even sure I know the difference between an antique and a collectible
I'm basically looking for artifacts from the years 1897 - 1929 or so. Old postcards, salt cellars.. things like that.