keeveek: No. *.99 or *.49 prices are the oldest trick in the world, and guess what. It still works! Unconciously, your brain treats the price 5.99 totally different than 6.00 , even though you know they're practically the same.
JSeas: True. However, the 4.99 still implies dishonest marketing practices. The seller is attempting to fool you into buying their product by making it appear cheaper. 5.00 implies the opposite. Which is the better image?
No it doesn't, they use that pricing for historical reasons, nobody I've ever met has seen something priced at 4.99 and assumed it was only 4 and even if they did it's not a big deal as when they get to the register they can still change their mind. And in most cases they can return the item later as well.
It astonishes me how many people believe that it's some sort of manipulative mind game where there's no reason to believe there is one.
Now, gas prices with that extra 9/10 of a cent may be.