anything between £60-£160, depends how much you want to earn, wat ur over heads are and if it is going to lead to other work.ppls pricing differs alot on here. if i was you i wouldnt go to high if you truely think you may get other work from it, but make sure you dont do it cheap as you need to make money and you will be setting ur self up for a fall if you do get more work from it. (they will expect that cheap as well)