OLX scam

I listed some old furniture on OLX, and within minutes, I got a call from a buyer asking about one item. Soon, he said he wanted to buy everything I listed, including a sofa , a tea-table , a computer and a cycle, and insisted on sending an advance payment to "close the deal." I asked for time to decide, and within minutes, another caller made the same offer, claiming to run a second-hand business around buying things from olx and selling further. I mentioned the first offer of ₹10,000, and he instantly raised it to ₹10,500, also pushing for an advance payment. While on call with the third guy , another buyer joined in ( he was calling me continuosly so i merged the call) , raising the bid further to 15000, and this back-and-forth continued until ₹20,000. They all insisted on UPI payments, but I refused, asking for cash on pickup. At that point, they backed off. I also overheard someone in the background repeating the same script, confirming it was a well-planned scam. These scammers think people are easy to fool! Now idk will i get a real potential buyer or not due to these retards