Did my first remote trade

I was studying for my exam when suddenly a remote trade notification popped up, so I rushed in. This person wanted an Armored Mewtwo. I wanted to trade, but I didn't have anything they wanted, so I just picked something random... And when I just logged in? Ta-da, a shiny Mewtwo arrived lol The IVs are a bit disappointing, but since the attack is 15, I should raise it well as a dealer. I thought remote trades happened in real-time, but you can choose for two days? So everyone isn't not doing it because they don't have time, but because they don't have anything they want...