You can get different answers from everyone when you ask them about the bestselling DSLR cameras. But Canon beats all the cameras when it comes to bestselling DSLRs.
What to expect from your DSLR camera?
These days, you will easily find DSLRs which fit into your budget and offer many more features than what they did a few years ago. DSLRs are now available with over 10 megapixels standard and also allow you to produce fine prints of at least 8X10. The newest DSLRs have a variety of lenses and self-cleaning sensors. Perhaps, this is the reason why Nikon and Canon always have the bestselling cameras; they provide the widest range of the best lenses.
Video is also an important factor. While looking for DSLRs, make sure you get one which shoots videos. They can shoot wonderful HD videos with their huge sensors. You will also notice that most of the bestselling DSLRs these days also shoot videos.