[Jerry Tee]

I am tempted to say neither. but first some information is required. What do you intend to do with the bow. If you are going to shoot it what type of shooting are you going to do? Compound bows of that age can hold some really nasty pit falls for the unwary ( like steel plastic sheathed cables with special ends)and getting spares is going to be a nightmare if you can get them at all. The problem will be that the design of bows as moved on a long way and the bits that went into the old design have long since gone as well.
Of the two the Jennings arrow Star was the better bow but it is a four wheel design that did not last long. The Bear White tail I think is more like the model T Ford.
If you really must have an old compound the get an old Oneida Screaming Eagle. Why? because the basic design of Oneidas has not changed in nearly thirty years. They got it right first time, that means that spares are still available for a 1980's bow
Next the cost. Importing from the States means that you will have to pay 17.5% vat on the cost of the item and the cost of the carriage and may be a clearance fee as well so it might not be as cheap as you think.
As for the bits and bobs you will need a sight, the type of arrow rest will depend on how on the bow. There might not be enough room for an arrow launcher and as for a release aid that will be optional as most of the very early bows were shot off fingers. If you go this route as well then you will need a Hoyt Supa rest and a tab along with arrows of the correct spine (stiffness)