It does look that way, yes. and the effect is very large, so it does look significant.
However, I'd probably be more comfortable if I first confirmed that finding with a statistical test. At a minimum I'd run the model you show above that treats price as a categorical variable and compare it with a model that has price as a single linear parameter. Then I'd compare the two models with the -2 log likelihood test and if the difference is significant then I'd be really confident in my assertion that the slopes at the ends of the price range are steeper than in the middle.