same here. Just got my letter as well. When I registered my "new" boat almost 3 years ago I went with bill of sale and cheque in hand to pay the tax at the same time. The lady at the counter told me I could not pay her, I would get an invoice in the mail but it might take a couple of years...she was right, finally got it yesterday! Called the number to tell them I didn't know where I put the bill of sale, could they just assess me "book value" and I would be happy to pay it. Lady on phone told me just to write an explanation letter, indicate price I paid, and send a cheque. So my question is, do I pay just on the boat/motor or do I consider the value of the trailer as well? Although there are lots of sneaky ways to cheat the tax man on this (some mentioned in this thread!), I would like to be honest about it (call me a dying breed)!