I have my new 1911 45 caliber pistol and will be going to the range this weekend to start breaking it in. It came with only one 7 round magazine. I went to my local gun store and all they carried were name brands for around $29 a piece. A local gun show is this weekend and I was wondering if I should go and see if they have any discounted magazines. How much should I pay and what brands should I expect to see at a gun show?