Final Fantasy X-2/Chapter 2/Guadosalam

Guadosalam is worth visiting in Chapter 2 for some completion points and for clues on where to find the Leblanc Syndicate for uniforms. If you already read the Airship Celsius page for this chapter, then you SHOULD know that you DON'T need to gather up clues and buy the data to find the uniforms; you just need to go to Djose Temple, Bikanel Desert and Mt. Gagazet to get the uniforms. But if you would like an easier way of paying off O'aka's debt (although you can still pay off his debt by the end of Chapter 3 just by only selling stuff you don't need to the Gullstore on the Airship and other shops in Spira and only buying stuff from O'aka), then please continue reading the paragraph below as well as the chart below that.

Upon entering the area, head toward the chateau doors to trigger a scene. After watching the scene, save your game and then head to the inn near the entrance of Guadosalam. Talk to the man behind the counter. He will sell you some "valuable data" for 10,000 Gil if you choose the "Got any data?" option while talking to him. You can then sell that data to someone currently in Guadosalam for a profit. It must be the person that the inn keeper references. The exact person is randomly chosen. It is important you save before talking to him. First because you may need to reset the game in order to get the best buyer and secondly because if you talk to the wrong person, the price the actual buyer is willing to pay will drop by 10,000 Gill per each wrong person spoken to. The following chart explains where to find the buyers and the price they pay.

Whether or not you sold the data, make sure to talk to the guards in front of the chateau for completion points. After that, continue on to the Thunder Plains.