I want to buy SLR and lens d300s and 24-70 lens. Because the agent is out of stock, we can only go to Zhongguancun, but there are still some. ...

D300S has been discontinued, so there are not many goods.

1 Don't go to the tall buildings in Zhongguancun. What kind of people downstairs are enthusiastic about you, liars and professionally trained;

Don't persuade you to change the model you want because of various sales tricks, there must be something fishy in it, and they will also play with double springs;

3. Look at the shutter times, whether there are scratches on the screws, etc. ;

4 lens to see if the zoom damping is smooth, and to identify whether it is a returned product;

If possible, it is best to find a talented person, which is the best solution;

6 It is more reliable to find authorized dealers online, and Wukesong can supply more;

7 If you are not at ease, you must ask for a formal invoice as a guarantee;

But you don't have to be stressed. Most businesses have a good reputation and will not run away because of a camera.

Good luck!