I have a massive heap of organic horse manure you can come and collect if you want to add to it,probably about 20 tonnes plus.You could add it to your compost and have a load well worth collecting. If you have a lorry and grab it would make it easier to collect,otherwise it would be a few hundred car boot fulls.Hilliers are selling the stuff for £3 a sack load,at that rate its worth a few grand.