C1617 Upgrade Once

After bargaining with Fishy, Lin Sen sold some stuff. After owning 80 million worth of Fish Coin, he was excited. He still felt a bit of heartache. He had sold quite a few good items. However, no matter how good the things were, it was useless to keep them in his hands. Therefore, he might as well exchange them for Fish Coin and obtain the battleship as soon as possible