Well, I heard before I went that you have to check your bill carefully and make sure people are not trying to pull fast ones on you. So I thank everyone on the site who gave me that advice. Here are 4 scams that were tried on me...locals 0...lilchappy 4!!!
1. Cashed about 200 euro for 6000 krona at a legitimate change place at the train station. Then, went to buy food at a little stand. The total was 500 krona which is really cheap but I gave her a 2000 bill, and got 1000 back. Not sure about your math, but she must have skipped basic classes. I tried to tell her I need 500 more but she said she did not understand, and she was right. Then I said.."Poicia, Police, Polza?" Then she said...ohhh, 500 for you, sorry.
2. Went to buy a water at a little stand. I got it, took it, asked how much with my money out and he said, "185". 185 is 6 euro! You can get a steak for 6 euro in Prague. I said, no thanks buddy, then he lowered is price to about 50 krona.
3. Hostel tried to scam me but may had been a mistake. They didn't include my money I paid for my reservation on Hostelworld.com. After proving to them that they were wrong they gave me my money back that I had overpaid. THE CLOWN AND BARD! Really sketchy place
4. The worst one. I was eating with a girl from Australia. We had 4 beers, two salads, two pasta's. The bill said, 4 beers, two salads, two pastas..all correct...but also had 1 shot, one dessert cake, service charge for 3 people, 10% service for the band that was playing, 10% for the waiter, and a steak! I cleared it up besides the 10% for the band. They were pretty good.
So beware and ask for prices before you buy stuff. Vendors bargin only because they try to rip you off. Prague is so cheap anyways if you do get ripped off, you are only out about 5 euro anyways. Enjoy the travels!