Drove 2.5 hours to get a BMW 340i that was listed ...

Drove 2.5 hours to get a BMW 340i that was listed at 29.9k. When I got to the dealership I test drove it and decided to purchase this vehicle. The manager came to me and said I m sorry but I listed this as the wrong price online. It should be 32.9k. I will honor the 29.9k price if you buy it today so I started to do the paper work and start the buying process. About an hour in, he comes back and says he cannot do the price that was advertised on line and we had to do the 33k price. Needless to say I walked out and am upset that such an easy task could be messed up. (Unprofessional). My sales agent, Alex, was very good throughout the process and was very upset that the manager made a stupid mistake.