Why can't items be sold? Im sure there are many inventories filled with things that may never be used again and some people don't have time to sit and earn thousands of crystals in order to create the most appropriate tank for their current rank.
there should be a name title reward such as; "V" for "Veteran" for being a member on elements for more than 3-4 yrs
like the "D for "Developer" or "M" for Moderator..." etc." nxt to the name.
the heros should increase stats slightly for the units that are in the same group. like 5% or so... depending on the unit rate. and the effects should go along w/ the hero's too... like the magician and ice attacks.
 "Tanki Online"){kind=icon}
 "Elements"){kind=icon}
 "Monster Arena"){kind=icon}
 "Epic War 4"){kind=icon}
 "Mushroom Revolution"){kind=icon}