It is the big question when you buy a used car in Quebec: is it better to buy from a dealership or from a private seller selling their own car on Marketplace or Kijiji? Both options have their place, but they do not protect you at all in the same way. Legal warranty, taxes, recourse if something goes wrong, mechanical checks: the gaps are real and they can be worth far more than the difference in the listed price. Here is an honest picture to help you decide, from the point of view of a Saint-Joseph-du-Lac dealership that sees both sides of the coin.
The legal warranty: the most important gap
This is where the balance tips strongly toward the dealership. In Quebec, the Consumer Protection Act (LPC) requires every merchant who sells a used vehicle to provide a legal warranty of good working order, whose length depends on the age and the mileage of the vehicle. This warranty is free and is in addition to any manufacturer warranty or extended warranty you may buy.
| Category | Age / mileage | Minimum legal warranty |
|---|---|---|
| A | 2 years or less, or 40,000 km or less | 6 months or 10,000 km |
| B | 3 years or less, or 60,000 km or less | 3 months or 5,000 km |
| C | 5 years or less, or 80,000 km or less | 1 month or 1,700 km |
| D | Beyond these thresholds | No mandatory legal warranty |
In practice, if a covered part fails during the applicable period at a dealership, the dealer pays for the repair. A private seller, on the other hand, is not a merchant: they have no obligation to provide this legal warranty. You buy the car “as is”, and if the transmission gives out the following week, you are generally left alone with the bill. To understand exactly what this protection covers, read our detailed guide on the LPC legal warranty on a used vehicle.
Taxation: two different regimes
Taxes are not calculated the same way depending on the seller, and that surprises a lot of buyers.
Buying from a dealership
You pay GST (5%) and QST (9.975%), a total of 14.975% on the sale price. Good news: if you trade in your old vehicle, the trade-in value is deducted from the taxable amount. On a $25,000 purchase with an $8,000 trade-in, you only pay taxes on $17,000, a saving of several hundred dollars that simply does not exist with a private seller.
Buying from a private seller
There is no GST, but the 9.975% QST is collected by the SAAQ at the time of registration. Watch out for the trap: it is calculated on the higher of the price you actually paid and the estimated value in the vehicle valuation guide (Guide d'évaluation des véhicules automobiles). If you pay $6,000 for a car that the guide values at $9,000, you pay QST on $9,000. To work out your specific case, use our used vehicle tax calculator.
Note: a vehicle gift between eligible relatives (spouse, parent, child, grandparent, grandchild, brother or sister) is exempt from QST at the SAAQ, provided both people fill out the form VD-80.1 and prove their relationship.
Safety, recourse and fraud
Beyond the numbers, there is peace of mind. A used vehicle dealer holds a licence from the Office de la protection du consommateur (OPC), Quebec's consumer protection office. At BonAuto, it is licence no. 2110539-1. That licence comes with obligations: labelling of the vehicle, disclosure of its condition, compliance with the legal warranty. In a dispute, you have clear recourse with the OPC and an identifiable merchant, with an address and a business number.
With a private seller, recourse is much thinner. If the seller disappears, changes their number or denies having hidden an accident from you, your only real recourse is often small claims court (a long, uncertain and time-consuming process). The most common scams between private sellers in Quebec:
- Tampered odometer: mileage rolled back to inflate the value.
- “Washed” vehicle: undisclosed total-loss title (“rebuilt”).
- Hidden defects: engine or transmission at the end of its life, masked corrosion damage.
- Unpaid loan balance: a creditor registered with the RDPRM can seize the vehicle even after you buy it.
That last point is crucial: before any purchase from a private seller, check the RDPRM (Quebec's register of personal and movable real rights) to make sure no loan is attached to the car. With a dealership, the vehicle is delivered to you free of any debt, which is the baseline.
Mechanical inspection and history (Carfax)
A serious dealership inspects and reconditions its vehicles before putting them on sale, and can generally provide you with the Carfax history report (reported accidents, maintenance, verified mileage, origin). Several vehicles also come with winter tires, a detail that matters in Quebec, where they are mandatory from December 1 to March 15, with the certified mountain/snowflake symbol.
With a private seller, none of this is guaranteed. The best practice stays the same whoever the seller is: have the vehicle inspected by an independent mechanic before you sign. But let's be realistic: convincing a private seller to let you take their car to a garage is often harder than doing it within the structured setting of a dealership.
Dealership vs private seller: the verdict
A private seller may list a lower price, and that is sometimes a real bargain, especially if you are equipped to assess a vehicle's mechanics and you do your checks (RDPRM, Carfax, inspection). But that lower price comes with no legal warranty, no simple recourse and a higher risk of fraud. A dealership sometimes costs a bit more up front, but you get the LPC warranty, the tax deduction on your trade-in, a debt-free vehicle, OPC recourse and, often, on-site financing, including bad credit financing solutions.
At BonAuto, in Saint-Joseph-du-Lac in the Laurentians, we serve the entire North Shore: Oka, Sainte-Marthe-sur-le-Lac, Deux-Montagnes, Mirabel, Saint-Eustache, Boisbriand, Blainville, Laval and beyond. Browse our used vehicle inventory, get a free valuation of your vehicle for a trade-in, or explore our financing options. And if you are still torn between selling it yourself or trading in, our sell my vehicle page explains how it works.
A question about a specific vehicle? Write to us at contact@bonauto.ca or call (438) 533-3090. We answer the way we would like to be answered.