I have a film school here in Los Angeles and if you have any interest in donating a 35mm and 70mm trailer, we'd really appreciate it. I need samples of things to show my students and 70mm stuff is hard to get a hold of, even on ebay. I can pay for shipping etc...
In terms of the projectors, decent pictures would help start the search for new homes. Identifying components can be done via image and some parts will have visual model numbers. There are some brokers who buy old equipment like that and re-purpose it. Boston Light and Sound is one of those brokers and I'd start with them. They can tell you how much things are worth and what to do with them. Another good site is film-tech.com, they've got some great guys on there as well. If they don't think there is any value in the hardware, then it maybe wise to find a school to donate them to.
In terms of complete film reels, it would be interesting to know what there is. Some prints of feature films have decent value if they're in good shape. So it's back to getting decent images. I'm sure we can help find homes for most of the film itself.