Ordered an item on a week ago. Listing showed a large amount of stock. Ordered and payed. Waiting a couple of days. Sent a message 3 days ago, no reply.

Sent an item reminder today. Got a reply stating they'll check. Item not in stock, requested refund and got okayed.

If you want to buy something, probably confirm the stock first regardless of the listing.
If you need something urgent, probably look for other seller.