What is an example of an accessible category $\mathcal C$ which is not essentially small, such that $\mathcal C^{op}$ is finitely-accessible?
More generally, what is an example of an accessible category $\mathcal C$ (not essentially small) such that one of the following related conditions holds?
$\mathcal C^{op}$ continuous (i.e. $\mathcal C$ has cofiltered limits and the colimit functor $Ind(\mathcal C^{op}) \to \mathcal C^{op}$ has a left adjoint);
$\mathcal C^{op}$ is precontinuous (i.e. $\mathcal C$ has colimits and cofiltered limits and the colimit functor $Ind(\mathcal C^{op}) \to \mathcal C^{op}$ preserves limits);
$\mathcal C$ has finite colimits and cofiltered limits, and they commute;
$\mathcal C^{op}$ is finitely accessible.
The closest thing to an example I can think of is the category $Hilb$ of Hilbert spaces and contractive maps, which is a self-dual locally $\aleph_1$-presentable category. But I don't believe that finite limits commute with filtered colimits in $Hilb$.