I have two 12V 100Ah gel batteries that I no longer have a use for. They are deep cycle, and the maximum charging current is 20amps, so they would make good wind/solar charged house batteries. If wired in parallel they could be charged by a 40A alternator, but they are not suitable for charging by a larger alternator, engine starting or windlass power.  The terminals are M8 bolts. Preferably they would be collected, as each weighs just over 30kg, but it might be possible to despatch by Fedex. 

A donation to Trussell Trust, Crisis, or Shelter is requested, to make someone's life a bit more comfortable over the holiday period - thanks!