This is my previous post

I saw a lot of people recommending to buy used CPU and other components and to my surprise I saw a lot of CPUs on eBay which are worth 4000$ are sold for 30$? is this too good to be true? or are these heavily damaged and they do not work?

Even if it was worth 600$ and I can get it for 40$ that’s a big win I believe, can you guys share your experience and do you think I can find parts that fit my needs? thank you