Senator B 3.0L 1991 White

My retired sister in law has a white Senator B for sale that she has owned for many years. It is the 3.0L version automatic. It has an MOT and has done 65K miles only. She says everything works, but the aircon has been disconnected. We want to know where to advertise it and what would be the right price? I can provide photos. Phone Bob on 0115 9258434