Actually, on my 3rd one I won a grand prize -- a Bernina sewing machine -- this was in '06 or '07. I have also won a couple of $10 gift certificates. Had a lot going on back then and I already have an (old) but wonderful Bernina -- so this one is still in the box... buried in a closet. When I get to it, it is promised to my brother's stepdaughter...
So, you never know, you get a feel for what different shops carry -- maybe you like modern or civil war.. whatever. I have found that if I do it a little at a time -- say 5 or 10 shops a day over 2-3 weeks, I get to all I need and don't spend hours of time....