While this forum does have regional boards you can post to, it is unlikely that you are going to find a lot of
local people to get stuff from like this. But if you do, I also highly suggest lettting people know your location since we have people from all over the world on this board. But I am going to guess from the email address you posted, you are in the Seattle area. Check out craigslist if you are looking for manure. There are lots of postings on there for people in the Puget Sound region who have excess manure.