I'm looking to buy pneumatics for the haunt this year. I am trying to seek out the best price for either a kit form or for the mechanisms themselves. Also what are some of the recommended controllers for a pneumatic run prop? Thanks!
Frightprops.com sells a lot of mechs but are a little pricey.
Monsterguts.com carries a lot of pneumatic parts at reasonable prices, for the do it yourselfer.
Random mechs can also be found on Ebay.
What are you looking for specifically? I've been in the pneumatic business for 15 years and build custom gags. I'm not necessarily trying to sell myself because I'm already pretty busy this year and Halloween will be here before you know it, but I'd like to help if you need it.