Research into average prices of music magazines

I have researched a few music magazines and the prices they are sold at. Vibe magazine is sold at £2.99 it is issued on a monthly basis. which is quite cheap and afford for all types of readers and age groups. Kerrang msuic magazine is however sold on a weekly basis at £2.20 a week. This is also a cheap and affordable magazine, although the age group that can afford it may be for an older audience such as 16+. I have decided that like Vibe and Kerrang my intended audience will be for young adults and older teenagers, preferably from the age  16-19 years old.