Not right indeed. A belly being concave is usually a bad thing.....
-unfocused picture (& only one)
-On bottom/corner of tank
-fins clamped to its side
-concave belly
-shadow on side of body showing indentation
-short introduction and history of fish for sale...
You're going to need to post more pics of this fish if you want to sell it. I dont know of anyone that would spend $150 on a fish without knowing anything about it and seeing the one picture above. I'm not trying to be rude, but come one dude.....