The depreciation rate for a Buick varies based on the model and the model year. But as a general rule, a Buick will depreciate about 35% over the first five years of ownership..
That sounds like a lot, but it’s not all that bad in the luxury car segment. Foreign brands tend to depreciate even more, and many luxury cars have a smaller resale market than Buick.
That said, you can always buy a certified pre-owned Buick. These come with low miles, a multi-point inspection, and even a warranty. If you’re bargain-hunting, it’s not a bad option.