and Cost Price, if Poss?
Your pre-existing health will need to be taken into consideration. You will need to be cleared by your primary care doctor. If you are cleared a face or neck lift may be a better option due to loose skin and decreased elasticity as we age. "Dr.D"
While you have not shown a picture of yourself, it is highly unlikely at age 78 that more simple treatments such as liposuction or non-surgical neck tightening will have any effect. At this age, you most likely have a significant neck wattle (loose skin) which makes up your double chin concern. Only a facelift (neck-jowl lift), with or without a chin implant, will be effective for eliminating your double chin. At age 78, the operation and recovery is really no different than if you were 10 or 20 years younger as long as your health is still good.