Reply to Propellerheads Reason 4

Just a quick question. I have a copy of Reason 4 - which was upgraded from reason 1. I really don't have time to use it these days so i'm believeing about selling it.
Now I've looked on ebay and there really aren't very many links to it.

So my question is this. How much do people reckon this would be worth??

I'm at work so can't post pics of the software with my user name - I wanted to know how much to pitch it for