So there is a problem, anytime a hero appears on the marketplace for buying it is instantly bought by another AI Empire within 2 seconds. You only learn about it from transactions history. Usually after I spot this transaction I have to load autosave several turns earlier, turn off notifications that would pop up next turn and obstruct your clicking ability, open the marketplace window, hit End turn, and within 2 seconds of this new turn you buy this just appeared hero. And yes, he or she would be bought by another AI Empire within 3 seconds if not for this.

There should be a way for buying heroes that suits the atmosphere of the game, not the atmosphere of load-autosave-several-turns-back-turn-off-other-notifications-watch-closely-2-seconds-window. A special fullscreen notification for every Empire that has 'Impactless Sites' technology for buying heroes that a hero just appeared on the market. If 2 or more Empires hit the button 'Buy' then auction starts where you can fight for this hero with dust and be able to sell your other resources to get more dust for bidding. Highest bidder gets the hero. Thank you.