As an amateur photographer, I use the both the studio that Allure use and many others around about.
Whilst not knowing EXACTLY what the rates are, judging by other customers at these places, you'll not be far off like for like - professional togs charging roughly the same rate as the girls. `
Of course, if you don't use a studio, as some agencies prefer, it takes out most of the costs. Simply looking through the Purestorm, Purpleport and Model Mayhem sites will show that there are many, many photographers in the North East who can produce good quality photos.
As an aside, I'll happily do "time for prints"!!