I have a very good ad spot on one of my sites, at the moment i have topic related PPC ad on it and roughly if gets 3000 clicks a month.

i am now considering having a related affiliate link at that spot, what do you think would the convertion be if 3000 users visit the link.

Hello:

Conversion ratio is something that is proven by statistics. Just guessing at a number will not suffice.

It also depends on your memeber base and the product, also how the sales page of the product is written ( a good sales copy ) and bunch of things really