Post tenure job search in the humantities: a waste of time?
Senior level hires at small, liberal arts colleges (SLACs) are uncommon in the sciences, rare in the social sciences, and very rare in the humanities. Why would a small college pay the same price for an associate or full professor when an assistant costs half as much?

R1s do senior hires because we want and can pay for name-brand profs. We often have named (and well funded) professorships to entice people to switch. Big name professors also bring in big name grants and attract graduate students. These latter concerns aren't as important at SLACs. 

That's not to say it doesn't happen. A SLAC might hire a senior professor in the humanities for the following reasons:


It's starting up a new program and needs an experienced hand to guide it
A senior faculty member died/left/was fired and all of the remaining members of the department are too junior to chair it
There is so much infighting in the department that the provost wants an outside chair to step in
Freak accident of nature


Since you have tenure, you can afford to be patient. Keep your CV, cover letter, and job talk polished. Go to all the right conferences. Be portable.