Is it safe to buy from Audiogon sellers?

I got bad experience, every item I bought needed to be repaired. Not enough one seller gave me negative feedback didn’t even want to resolve issue, he just attacked me I assume , because he knew what he had sold. Or many sellers they do not inspect carefully items . Even recently I got bad dishonest strange issue . With TMR who I is big store with great feedback. I wanted buy item and we got agreed the price, and just in case I called the Nick with questions about the item because from pictures it seems to me it looked that it is greater model that I was looking for, Nick quickly realized that too after he invested problem he canceled the deal . And they adjusted the price and the item description. He kept me on hold lying that they have missing parts and they don’t want to sell it to me that way . So I understand my mistake, I should pay, without stupid questions, if big business doesn’t know what is selling and I help them sell items for money so that’s why I loose they win. My point is that is not safe here