Glass panes can apparently not be sold to server. I don't know why but I think it would be a good idea that they are able to be sold to server, because glass is. Earlier I saw someone selling glass panes for $10 per pane and he/she even said that there was no server price. I think glass panes should be able to be sold to server at a price of $1.20 ($0.20 is glass block server price x 6 = $1.20)
The best thing to do is sell them on the market. If you need panes, buy glass blocks and convert them. The less items that have a server price the better our user economy can be controlled.
