How come the Avadon game is so cheap(it is 3.49 euro now from Steam)but the Avernum games cost much more?

Check out the man that made the games blog about, among other things, price choice here:
http://jeff-vogel.blogspot.com/2011/08/avadon-is-out-on-steam.html

It's basically a test from the developer if and when so, how much better it sells. He explained it on his blog here.
This means the more people buying it, the higher the possibility of other Spiderweb games to appear that way - so what are you waiting for? ;)

Edith said: I suck at typing fast enough :(

While we are at it... I just posted a SG giveaway for Avadon, so go and get it!
(you must be a member of the Steamgift Steam group to see that)