I do hope all works out well for you and if you are taking possession of the pony, get something in writing - bill of sale for example. There's been too many folks write in here (on the forum) to tell of things going sideways in a hurry and only a verbal agreement that is of no real use in settling the dispute either in court or out of it.
Thank you! In writing for sure! Whenever large amounts of money, property or animals are involved.. Always.