I've been pretty lucky here in the NE corner of Indiana, several good smaller shows in the area and I always seem to find something to make the trip worth it. My all matching CE 42 K98k came from a local show. I've also found a FN made Venezuelan mauser carbine, matching original '42 91/30, Husqvarna M38, all matching non-refurb Tula SKS, all matching original Yugo Model 24 mauser, along with a few other nice milsurps. I've also found some real nice bayonets, slings and other accessories. Like others have already said, it's also a great learning experience to see what milsurps are available, prices, bubba'd or not, etc.
Some of the stuff I see for sale at a gun show is weird though, Lego toys, purses, so many pocket knives and always some display about rain gutters or roofing or some shite. Save your sales pitch, I'm here for the old rifles.