The Philip K. Dick sale novels and other discount titles out from Houghton Mifflin Harcourt/Mariner Books are also $1.99 at Kobo in the US ($2.99 in Canada, sigh; our petro-dollar hasn't dropped
that much

), and couponable to boot (at least in Canada).
Linkage for the HMH imprint sorted by price @
Kobo.