copyrites and fashion illustration on website

Hello to All,

hows the rules when a client wants to buy a copywrites for picture that will be used for his website?
does that mean that i loosing all rights for the picture?
i want to know for what it will be used for,but what about if client playin not fair,pay me peanuts and then i see picture on builboard and they make much more profits of it,or he put it on website with other pics and mak profit from others?
what kind of agreement should i signit on ,can i find online somewhere?
and also what price should be with copyright,if 10times bigger or 50% more?

thank you sooo much for your advices

 

Hi,

I've found this: Intellectual Property Office - Selling your copyright

I hope it helps, as there's more to read on copyrights.