Example: Let's say you're interested in buying a used car with a private party sticker price of $5,000. If the seller sees that you're a serious buyer, then he may drop the price down to $4,500. Let's then assume you offered him $4,250 in cash. He's more than likely to take the deal.
Buyers might also run across steadfast sellers that won't budge from their asking price. In these situations, it's usually best to let some time pass before revisiting with a counter-offer. Consider paying their price only if you're fixated with the vehicle.
Example: Let's say you're interested in the same buying a used car with a private party sticker price of $5,000. You make him a reasonable offer and the seller sees you're highly interested in buying. He might use that as a bargaining chip in his own favor, and tell you that he has another offer on the vehicle that beats your offer.
The key is to go slow if you want to save dough in negotiating. If you lay all your cards out on the table too early, you'll get taken for a ride - and not a pleasant one - in your new car! Once you've wrangled yourself a final price, make sure your seller completes all necessary paperwork in a timely fashion.