This is one of the questions that I can never really answer. The cost of getting a tattoo varies wildly from one artist to the next, one tattooist to the next, and even on what the content of the tattoo is.
The more talented the tattoo artist, the more expensive, which really goes without saying. But it also varies by location, a top notch tattooist in London, for example, would be able to charge more than a similarly skilled tattoo artist in a little village.
Also, some tattoo artists charge per hour of work done, and some will set a price at the beginning.
Obviously it also depends on the size of the tattoo, and also whether you are part of a culture that tips (I’m English and we don’t really have a tipping culture but I know most of America does) could effect the price.
Honestly I couldn’t even begin to guess how much it would cost you, your best bet would be to find an artist you like, set up a meeting with them, discuss what you want/size etc. and then your artist would be able to give you a ball park figure for what you decide on.
I’m sorry for being so vague, but it varies so much that I wouldn’t feel comfortable guessing. I hope I’ve helped a little.