iHobby Expo in Chicago which focuses on model trains, cars, aircraft etc. While the fan base clearly skews male the vendors are more of an even mix and a lot of people are bring their girls along. Some of the vendors still completely ignored me and I think gender might have had something to do with it as they initiated conversations with males customers beside and even behind me--especially the 3D printer stall, which is ironic as I am extremely interested in buying one of these things.
My preference is to go later on an expo because vendors will give you a discount to avoid shipping stuff back, and may sell display models. Of course by them people are tired and a lot fo stuff is sold out, so it is a trade off. It paid off for me this time. But I must say the $12 entry fee strike me as steep. I guess they need to to pay for the $100,000 of television adverting for the two day expo.
My top rip off was a Syma helicopter (see on Amazon) on a fake discount. At $40 I paid a full $10 over what I could have got it got is for in a normal store. Oops.
Composimold with is a reusable rubber material you can make mold with. I had been using a composite rubber where you could only make one mold. this stuff can be reheated in the microwave and reused. I got a tub as at good expo discount that pretty much made back my entry fee.
My best deal was a precision rotary from Proxxon. I got the FBS 115/e for$60 cash which is lower than what it goes for even when it is on sale.