Nagelled - Getting scammed or taken advantage of. You thought you were

Getting scammed or taken advantage of. You thought you were getting a deal, but now you're out of pocket and out of luck.

I thought I was getting a free pizza, but it was just a half-off coupon.

I thought I was getting a good deal on my car, but I got a used one that barely ran.

I thought I was getting a free concert ticket, but I had to pay for parking and a drink.