Let's meet together, talk, and swap. You have things sitting in your garage or storage units in which were for a campaign that is not useful anymore. It could be something new and interesting to another larp.
Think of those tabards for that now obsolete enemy or house or those spectacular props which are too recognizable for you to re-use. It took time and money to make these but now they are just gathering dust. Bring them out to trade or maybe even sell.