Do you need to sell it? Are you desperate? If so then respond. If it’s a ridiculous offer I’ll respond with a higher amount than what it is listed for. Most of the time I don’t respond. House bids are different, the realtor has to submit the offer, but the seller does not have to respond. The buyers realtor will tell the buyer to make a bid good enough to get a counter to get negotiating started.
I don’t need to sell to buy what I want so I can sit on the piece for a while. Eventually everything sells.