I don't own a console, but if the console release has just as much as the current Terraria has or more, I'd say $15 to $20. No more than that.
None, I already bought the collector's edition of terraria, and because of that, I feel I should get the xbox or ps3 version without cost.
You'd have to buy me an xbox360 and sell me the game for around steam cost or no deal. (the console version will probably be released for $30, knowing capitalists) Though, I am willing to pay for any extra pc content.
$10* If the console version goes on sale for $30, I can bet you a large percentage of people won't buy it. Paying $20 for a marginal amount of added content would be not only ridiculous, but utterly retarded.
Purchasing this for the console is the same as purchasing another copy for a friend -if they are around the same price- with extra