Are you a BC resident? If so you'll have to pay the BC taxes
(PST). If you are going to register it you'll want to make sure the bill of sale
is correct so you might contact the Department of Transport Ship Registry on that account. If you are a resident of another province you can pay at that provinces rate but you'll need to record
the lat/long where you took posession and that can't be BC waters. It's good to be an Albertan at that moment in time. If you have an address there you won't have to pay PST. If it's a used boat
I don't believe you'll pay PST (I didn't) but you might give Customs
a call and ask about duty. Call the port of entry you will use and what they tell you will stick. If you call a port other then the one you use they won't be bound by what is said (I'm not making that up). You will need previous owners current registration
information and I'm pretty sure they will have to do deregister at their end. I may have some of this wrong but it should give you some ideas of who to call and questions to ask.