How to trade on Warframe

The Most reliable way to earn Platinum in Warframe without paying for it with your hard earned on is to farm for rare modes. Then post a "wts" (want to sale) in the trading chat. I also look for "wtb" (want to buy). I suggest opening up your mods inventory for quick searches, to see if you unknowingly have what someone "wtb". That was the case in this vid with the last sale. ***(some parts of this video was cut out for time purposes. Total time for both transaction took 17 minutes for 35 platinum)