Instead of making forums as our main planet/artifact trades why not just make an Auction House in the game where players can bid on a certain Artifact or Planet.
EG.

Planet - Colossal x17 Plasma or Artifact - Repair Nano's 200x Bundle

24 Hours - 72 Hours (Example) Depending on the creator's choice.

Ctp:Ku Ratio 12-15Ku's per 1 CTP (Example) Depending on the creator's choice.

Min Bid: 1000 Ctp's / 12000 Ku's (Example) Depending on the creator's choice.

Auto Win Bid: 10000Ctp / 120000Ku's (Auction maker chooses to have Auto Win Bid as an optional category ON/OFF)

If you bid, you deposit your current bid on the planet/artifact and if someone outbids you, the CTP/KU's you deposited will be withdrawn from the auction. Once you've earned back the CTP/KU's you've deposited from the auction you will be able to join back and if someone AutoWin bids on the item, the CTP/KU's that he/she deposited on the auction item goes straight to the owner of the item and the winner instantly gets the planet/artifact on their list.

REMEMBER: If there's any suggestion to improve this topic please comment on it or if there's any mistake that was put in please correct it. Feel free to criticize the topic. Pretty new to this suggestion & ideas page so was just typing what I think was a good idea in the game.

Dan actully dislikes planet trading, so I doubt there will be any function added to make it easier.

Would be a good idea if Dan wasn't against the topic as a whole XD

viewtopic.php?f=6&t=5207

Not entirely sure, but I think the Galactic trade centre is more or less what you suggested. I agree with the above post, though. I don't think Dan's going to consider planet trading because that would mean the 5 GP it costs to abandon a planet will become pointless, and of course Dan loves it when people spend GP on the game since that makes him money.

Dan has already stated that a "galactic trading center" will be in the next update.

Where? It's been in the "Coming Soon" list for 6+ months and he specifically told a friend of mine that he's "not rushing" the GTC.