Expensive parts - Sets to part out

BP · 2016-01-20T21:46:21.000Z

Hi, I'm not sure if I'm in the right subforum for this question. I'm quite new to the lego buying and selling thing but I'm learning a lot these last couple weeks. Thanks to this forum I found out that a Pearl Dark Gray Hero Factory Shield with Handle for Clip brick is worth quite some money thanks to the batpod. I have a store nearby that is kinda forgotten by the big public and they have quite some older sets available. I cleared out most of the sets worthy of flipping or storing in these last couple of months. They have two sets that contain the above mentioned piece so I bought them and almost immediately sold them on bricklink with profit. There are some more left so I'm getting them first thing tomorrow. Now here's the question: What other parts are quite expensive and come from rather cheap sets? And thus are worth searching for and parting out? thanks in advance.