My take is this: the amount of money saved by purchasing a Canadian Viper is offset by the hassels of importation (shipping, taxes etc.), modification, and warranty concerns.
Be aware, the taxes paid on the purchase of the car vary from province to province. For example, if you purchase the car in Alberta, since Alberta doesn't have any Provincial Sales Tax (PST), you wouldn't pay any tax at all in Canada, assuming that the vehicle is used. If you are purchasing a new Viper anywhere in Canada, you have to pay the Goods and Services tax, which is 5%. But, if you are purchasing the vehicle in Ontario, you have to pay what is called the "harmonized sales tax", which is a combination of PST and GST, regardless of whether or not the vehicle is new or used. So, you have to pay 13% tax on a used Viper bought in Ontario. Yes, you read that right, 13%!!!!!!! When you consider that any Gen V car is going to be selling for 80K-100K, you are looking at over $10,000.00 Canadian (about $8,000.00 U.S.) in tax alone, before you have even moved the vehicle towards the border. Then you start looking at shipping costs, which are going to run at least a few thousand dollars. I haven't even touched on resale value. In Canada, a U.S. vehicle traditionally takes a hit on resale value. I'm not saying that it should, necessarily, but they do. People up here want to purchase a vehicle that was originally purchased and imported into Canada directly from the manufacturer for various reasons. One of which is the speedometer/odometer issue.
At the end of the day, I have seen many people suggesting U.S. residents consider purchasing a Canadian Viper based on the price differential and exchange rate, but it isn't that simple. A closer look reveals that any potential savings will likely be nullified. I can easily see the cost of this transaction eclipsing $15,000.00 not to mention the "hassel factor". One last point, typically, a Canadian bank will not finance the purchase of a vehicle located outside of the country, particularly when the vehicle itself is being used as the collateral for the purchase. I would imagine U.S. banks would take a similar approach, since they have no jurisdiction over recovery of the car should there be a default on the loan, and the car is the collateral. This is opening them up to an unreasonable amount of risk. Therefore, you need to either pay cash, or put something else up as collateral for the loan, such as your house. In other words, unless you have 80-100 large sitting in your bank account, you are probably out of luck. Particularly if you're married. I can't even begin to imagine the conversation, "Honey, how do you feel about me putting up the house as collateral for a Viper I want to purchase in Canada?" Hahahahaah.................. Um, I don't think that will end well.......