Alas, do newcomers often catch blindly? Looking at the new LED screen price that costs hundreds of thousands of yuan, I was so fond of it that I wanted to buy a second-hand product but I was afraid of falling into the trap. Nowadays, I wanted to find a reliable trading channel, how could it be more difficult than finding a partner? Don’t worry, let’s understand this bottomless second-hand market today!

Channel selection is like finding the right place to open a blind box

​​The key point is here​​:There are three major categories of mainstream trading methods:

1. ​​Professional equipment recycler​​: They usually have batch retired equipment in their hands, such as advertising screens replaced in shopping malls and stage screens removed in concerts. Last year, there was a recycling company in Shenzhen that processed the old screens of 3,000 square meters of sports stadiums in one go.
2. ​​Industry Exchange Forum​​: Some vertical BBSs have real treasures hidden. I have seen someone receive 90% of new floor tiles at a discount of 30% of the price. The key is to see the time of posting - 80% of those posted for more than 2 weeks have taken action.
3. ​​Equipment leasing company circulation​​: Especially for temporary active screen rental, the equipment turnover rate is high. There is a trick: when going to Taobao at the end of the year, many companies need to update their performance equipment

For example, the transaction data of a certain industrial product trading platform last year showed that the average circulation cycle of second-hand LED screens was 47 days, and the professional recycling channel was 15% premium to personal transactions, but the warranty period was 3 months longer.

I advise you not to step on these pitfalls

Some of the most common things new to lose:

• ​​Only look at the brightness regardless of the gray level​​: Some second-hand dealers have adjusted the brightness to the maximum, but in fact the gray level drops below 10 bits, and the videos are all mosaics.
• ​​Ignore the attenuation curve of the lamp beads​​: The brightness attenuation of normal screens for three years should be within 18%. Use the spectrometer to light the lamp beads. If the color temperature deviation exceeds 500K, please withdraw immediately.
• ​​Thunder is hidden in the seam of the box​​: Remove the corner box on site with a screwdriver. If you see the PCB board turning yellow and black, this screen is specified to be soaked in water.

Last year, a friend collected a batch of inventory screens for cheap, but when he turned on the power, he found that the control card was a model five years ago, and now he can't even find the driver software. In the end, I found a reliable manufacturer, and spending the modification fee is more expensive than buying a new screen!

Five-piece set required on-site inspection

Don't go to the equipment empty-handed, bring these guys with you:

1. ​​Grayscale test chart​​(Just save the phone) Check whether the color transition is smooth
2. ​​multimeter​​Test whether the output voltage of the power module is stable or not
3. ​​Thermal imager​​Check whether the heat dissipation is uniform. If you have dark spots, pass it immediately.
4. ​​Save a 4K test video from USB​​, fast forward and fast reverse to see if there are any stuck frames
5. ​​Tape Measure Splicing Seam​​, there must be problems with assembly with an error of more than 0.5mm

An expert told me that he must bring a magnifying glass to look at the solder joints when inspecting goods. If there are signs of re-welding on the lamp bead welding joint, the screen will definitely have been repaired for several rounds. You can learn this trick, it is more effective than any detection software!

Price negotiations have hidden secrets

The quotation of second-hand screens is very deep, remember these market benchmarks:

• ​​Equipment within three years​​: The residual value rate is usually 45-60%, depending on the usage time
• ​​Small spacing below P3​​: The annual depreciation rate is about 18%, which is more than the regular screen saver
• ​​Special model​​: Curved screens and transparent screens may appreciate in value, but the second-hand price of classic models of a certain brand is 15% higher than the new product five years ago

I will teach you a trick: check the screen factory number and directly find the original factory to adjust the maintenance records. There is a manufacturer that is very interesting. As long as you report the serial number, you will check the entire life cycle data. Even the power modules you have replaced are cleared!

I want me to say that it is like taking the pulse of the second-hand screen in traditional Chinese medicine - you need to look, listen, ask and cut. Now some manufacturers are engaged in exchanging old products, and the appraisal price of old equipment can be 30% new models. This is much better than arguing with second-hand dealers. I heard that a Shenzhen company recently launched an old screen renovation service and extended the warranty for two years, which is much more reliable than those screens of unknown origin on the market.

The last nagging sentence: If you really want to save money, you have to spend more time. Don’t believe in the nonsense of "new inventory" that is not opened. After staying in this industry for a long time, you will know that a good screen is like an antique, and it is always circulated, but no one is willing to sell it!

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