In Canada at Kobo (usually but not always price-matched at other Canadian retailers), a number of titles going dirt-cheap as part of the Victoria Day long weekend sale, still good for the next couple of hours (sometimes Kobo has a nasty habit of expiring sale prices an hour or two before midnight Eastern Time, though):
Guy Gavriel Kay has assorted novels going at $4.99 CAD from Penguin Canada. NB: the two parts of the Sarantine Mosaic are also priced at $4.99 together in the omnibus also on sale as well as individually, and some of the novels have been in sale-priced omnibuses previously, so check your records before purchasing. ETA: Tigana is newly discounted. I haven't previously noticed it on sale in the past couple of years, and it's not in any of the omnibuses, so this is another title that I'll be snapping up shortly.
Sebastien de Castell (eligible for the Campbell Award this year)'s first 2 swashbuckling fantasy novels are just $1.99 each, also from Penguin Canada.
There's a bunch of Kelley Armstrong and Justin Cronin for $3.99 each.
Linkage:
Fantastic Science Fiction & Fantasy
Fabulous Fiction (one of the GGK novels is filed here)
Hurray, YA! (some of the Kelley Armstrong is filed here)
Page Turning Mysteries and Thrillers (also contains Kelley Armstrong)