If you find something you want on eBay, resist the urge to just hit "Buy It Now." Add it to your Watchlist or leave it in your cart, and then just close the app for a few hours.
I actually sell on eBay too, so I see this from the other side all the time. When you watch an item or leave it in your cart, eBay notifies the seller that someone is interested. Since we really want to make the sale and clear out inventory, eBay gives us a button to send a private discount (usually around 5% to 20% off) directly to anyone watching it AND for those who will watch it in the future.
I’ve found myself paying 25% less than I would’ve by receiving an offer and sometimes getting a counter offer accepted.