Re: PA out of state boat purchase & taxes
When you register the boat, you will be required to pay 6% sales tax on the bill of sale price---unless it is obviously lowballed, like 100 bucks for a 1990 20 foot hull.
However, if you have a reasonable price stated, the Motor vehicle license store will accept it.
If the hull is newer than (I think) 1978, then you will need a title in order to transfer the boat to your name. It is always preferable to have the (Jersey) registration in addition to title and bill of sale.
The trailer is licensed separately and fee is according to weight. You can register a trailer for 6 years by paying the 6 year's fee but you save the yearly fuss and bother. Again, you need the bill of sale, the registration and title. Sometimes you can get away with less but they seem to be getting a bit more fussy lately. So since it will be at least an hour drive, it would be preferable to get the all paperwork before you leave.