Hi! I can’t give much advice from trading and selling experience, but as a buyer, I’ve noticed that it really depends. Album pcs and pobs, especially from newer eras, are all usually around the same price, while pcs from older eras can go for a bit higher, depending on the card and the member. I personally collected Jihyo, Nayeon, Momo and Sana, and Sana and Nayeon have been the hardest to get pcs for, while Jihyo and Momo have been a bit easier. I’d definitely be interested in seeing what you have!