He had many Second and even Third Class items that were of no use to him. He could keep them with him and sell them outside the sect in the future, but he needed resources now to strengthen himself in City Thirteen. With an enemy like William interested in his downfall, Liam didn't want to take any chances.
He planned to keep only Third Class artifacts and resources with him and sell everything else!
He had enough for himself and each of his wives, including Ann and Joan, with whom he hadn't cultivated yet, and Mary's friend, Jane. This included consumables, but also materials useful for making pills, potions, enchanted items, etc.
Liam had so many items to sell that it wouldn't be enough to go to just one shop. He would go to four artifact shops and sell 80% of what he wanted to get rid of that morning.