How to test a two-handed SLR camera? How to prevent being cheated?

I can't help it Now the world is really a little out of fashion. I firmly believe that there are still many good people in the world, but because few bad people pretend to be good people, we should guard against all people by guarding against bad people. Now our national conditions are like this. The illegal cost is very low, and the cost of safeguarding rights is extremely high. When you are cheated, the best result is often just warm sympathy from a group of people who don't know the truth. Most swindlers end up getting away with money; Therefore, we must be careful again.

I have bought and sold second-hand goods. So far, I have searched (published) second-hand information through two websites, one is the second-hand trading version of Hummingbird and the other is Color Shadow. I feel that the process of selling things is very simple, probably because I will do some homework in advance to understand the general market. Generally, I will set a price one or two hundred lower than the market, and I have always cherished things and have a good color. At the same time, pretending to do things is more conscience. Anyway, just tell the truth. But I'm really nervous when I go shopping, so it takes a long time every time.

Unless you buy things from a reliable friend who knows everything, my personal suggestions are as follows:

First, we don't approve of all non-face-to-face transactions. Especially through express delivery in different places. Anyone who has seen the airplane and train loading and unloading salute knows how our domestic postal system handles goods. Camera lenses are all precision instruments, I dare not say so exquisite, but I stumbled all the way, who knows what will happen; No problem, of course there is nothing to say. If you find anything wrong in your hand, you can't tell each other clearly.

Second, do your homework in advance to understand the market and knowledge (such as the numbering rules of lenses and fuselage, etc.). ).

Third, it is best to bring two tools: a laptop and a flashlight. The notebook computer is used for debugging, and the flashlight is used for observing the lens.

Fourth, look carefully first, the finer the better. Look at the color, mainly in those places where normal use is easy to wear. For example, belts, hot shoe joints, battery contacts, etc. (All belong to the place where "brand-new" can be denied at a glance) Wear it first, then handle and corner. Check every screw carefully for scars-it won't be disassembled for no reason. A flashlight is very useful when checking the mold and dust in the lens.

Fifth, don't bother to take some photos, and then import them into the computer to look at them carefully. If there is detection software, it is better to verify the identity on the spot. Don't pay attention to the fidgety expression on the seller's face, let alone the friendly smile on the seller's face, hehe. When you find a problem, ask it immediately, don't hold it back; Especially don't be embarrassed to ask for fear that others will look down on you.

Sixth, the seller must leave "written evidence". If it is a business, you must get the invoice. If it is a person, let him write one on the spot. The recommended format is as follows: "Today, I sold a set of ××× lens body, and received RMB×××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××

Seventh, after the second-hand equipment is bought back, it should be disinfected. The easiest way is to wipe those places that come into direct contact with the skin normally with disinfectant wipes.

In short, just be careful. Who makes us unwilling to pay a new price, thinking that nothing will be delayed? Go to a big store to buy brand-new licensed goods and watch them unpack and invoice. This is a post job.

Personally, I don't recommend buying the following things second-hand: storage things (CF/SD card, mobile hard disk, etc. These are not expensive in themselves. I don't know how much they cost. If something goes wrong, you may lose a lot. Battery (not expensive, and I don't know what the cost is); Photographic bag (in case the original owner has some skin infection, it is also used for shoulder straps, wristbands, hats, vests, etc. And another discussion about bringing large medical disinfection equipment at home).