Dina Matte Satin Bodysuit

I ordered this is the blackberry and the color is gorgeous. It’s a nice bodysuit. However, I don’t understand the high price point bc it’s 100% polyester. It seems more in line with something that would be closer to $100, vs over $300. Or I’d expect the fabric to be made of silk. It runs slightly small in the area where it transitions to the panty too. It’s pretty but at this price point, I feel like I’d expect it to be perfect. I’m on the fence as to whether to keep it or not.