I do band posters all the time, mainly for jazz musicians. The posters are usually photo-based, but I can also illustrate, depending on the concept. I will use these style that you can see on the examples.
The final price will depend on the amount of work the piece requires. Please
be as specific as possible at the beginning so that the whole process
doesn't take more time than necessary and you can get you work done as fast as possible.
Band event poster
Poster for a specific event/gig. Can be both illustrated or photo-based.