How to choose the right hardware for avito/olx?

Question

Iron

I've been thinking about upgrading my PC for a long time. A square monitor, a mouse for 40 hryvnias and a system unit from zero, something needs to be changed. Today I looked at prices and generally existing components, not that expensive, but the prices still bite. I decided to look at sites like Avito and there, in the end, you can assemble a PC for a much lower price. The desired PC for $700 can be assembled there for $500-$550. And these are just the components, the monitor will cost even less. Moreover, I considered this according to new components, which are allegedly purchased immediately at the factory and sold to us cheaper, it reminds me of some kind of fairy tale. Used will cost even less, half of the store price, but in most cases it is reported that the video card_name was used for only half a year, even the warranty is still left. Since I'm a student, I still have to save for a long time,
How to choose the right iron on such sites? What should you pay attention to? Better in person or delivery? What should not be bought on such sites (monitor, for example)? And in general, tell us from your experience how you bought components on avito / olx.

Answer 1

who allegedly buy immediately at the factory and sell us cheaper, it reminds of some kind of fairy tale

much cheaper than big stores like yulmart sell - it's almost impossible. There may be some gray offices that transport iron past customs and taxes, but the difference will not be half. It makes sense before buying to compare prices in different stores through some kind of aggregator like Yandex Market.
Buying "like new" more or less expensive things on olx is generally a lottery. Imagine that you received a video card from a courier or mail, for example, you brought it home, but it does not work. Complaining is completely useless. On olx, there is no such thing as a seller rating as a phenomenon. Just a paradise for all kinds of throws.
With used iron, everything is more interesting. Pieces of iron purchased somewhere in Europe can look especially tasty. They bring quite a lot of things from Norway, and quite cheaply. It's best to find some familiar "computer" who is in the know, and give him so much beer so that he can advise and help with the assembly not in the "fuck off" mode, but "as for his own." The piece of iron must be checked before buying.

Answer 2

Generally good advice. Look not at Avito\olx, but at the forums of people involved in hardware.
For example, I also collect almost all used spare parts. But I buy on the forum of overclockers. There you can safely take from people whose accounts have been created for a long time. Plus, it's more or less clear why people often change hardware, tk. it's more of a hobby.
Well, yes, check before you buy. A normal seller will either give moneyback (again, on the forums, old-timers value the cleanliness of the account), or he will give himself the opportunity to test the hardware.