I'd love more variety at the shows too. I'd like to see some mainland manufacturers and vendors come in. I remember Colt I think came in and had their wall of M16's from prototypes when they were first made to current stuff. Invite vendors like Magpul & training school, Troy, Glock, CMP, etc. Like a small trade show. I'd also like to see all of the local shooting clubs like MPPL, Koko Head Skeet & trap, military teams, and the like displaying what they do and try to attract participants.
As far as prices go, I know it's difficult for businesses to lower prices. Firearms have small profit margins. Ammo is probably at the lowest prices they can go. Lots of hoops to go through and extra cost in bringing in and processing firearms and ammunition. Accessories usually have higher margins. If a business lowers prices to where we'd like, then it wouldn't be worthwhile for them to sell anything at the gun show. Used stuff does seem overpriced on average though.
A lot of the top firearm enthusiasts in Hawaii are in this forum, so I think it'd have to start with us on bringing out new things. Tables are cheap at the gun show so you could make displays or sale tables.