As you Chaps seem to be local PA fellows, I would suggest going to one of the small firehall shows in northeast PA and well as the Forks of the Delaware show in Allentown. Reason is that at the smaller shows and Allentown you will see older collectors sellng off their collections and that is when you can get a decent deal. I find shows up north of Allentown to the the water Gap to be very productive.
Same is true when I have sold stuff of at teh Forks, I generally price it to sell, as I do not want to carry it around with me but sell it at one show. of course I do not set up at shows but once every few years to clear out what I am done with, but I generally sell every arm that day. There are a number of collectors of the ame mind set, so while not every show is great, about every other show I will find a deal at the forks in an area I am interested in. Now you are nto going to get a matching K98K for 500 or any of the areas of high collectablity, but in the items of less interest, like Enfields, spanish arms, etc, you can often get a deal, as the guy selling bought 10 years ago and just wants to move it, cover their table costs without getting raped.
Placed like the Oaks are good to see a lot of stuff, and get bit or surplus deals on magazines or items in common trade, but when it comes to older military surplus rifles , well you are dealling with mostly stocking dealers and they have to cover their overhead and profit. The price of the tables is sufficently high that it excludes most individuals selling one or two arms.