Bargain @ $0.99-$2.99 from assorted HarperCollins imprints in Canada & presumably the US (should be the same price in all the usual stores):
@ $0.99:
Without A Word by
Carol Lea Benjamin, 8th in her Rachel Alexander mystery series which has a dog as a sidekick. At the $2.99 CAD mark (may be price otherwise elsewhere), there's also #7,
Fall Guy
@ $1.99:
- Charlie Martz and Other Stories: The Unpublished Stories by Elmore Leonard, a collection of early works (of which the blurb says 4 were actually published, but the others not, and contain early appearances by some of his classic characters)
- Deadly Housewives edited by Christine Matthews, an anthology of 14 short stories on the titular theme, including contributions by Matthews herself, as well as S. J. Rozan, Sara Paretsky (of V. I. Warshawski fame), Carole Nelson Douglas, and many more
- Aunty Lee's Deadly Specials & Aunty Lee's Chilled Revenge by Singaporean writer Ovidia Yu, 2nd & 3rd in her cozy mystery series featuring the titular Singaporean widow. I've read the 1st of these from the library, and while it was a little too saccharinely cutesy for my taste (YMMV), it was overall an interesting enough setting and story that I'm willing to try more on sale. Another novel further in the series, Meddling and Murder is currently just $3.99 CAD.
- Girl in a Box by Sujata Massey in her Rei Shimura series starring a Japanese-American sleuth
- Not A Girl Detective by Susan Kandel, 2nd in her CeCe Caruso series of cozy mysteries starring a mystery writer biographer cum fashionista, of which #1 & #3 have been on sale in the past few months
- What the Dead Know by Laura Lippman, psychological suspense thriller
- Metro Girl by Janet Evanovich, 1st in her Barnaby & Hooker series of humorous mystery/adventure thrillers with car racing elements; I think I've read a comic book adaptation spin-off in this setting, which ISTR was nice light fun. (ETA: turns out I did, and liked it enough that I was going to have a look at the originating series, and that was 6 years ago and I never did.
But at least it's cheap to try now? 
)
- Carved in Bone by Jefferson Bass, 1st in Body Farm forensic mystery series, which we've previously gotten as a freebie a long time ago
- Orient by Christopher Bollen, a standalone atmospheric locational mystery which the blurb says was named Amazon Best Mystery of 2015
- Dance of the Bones by J. A. Jance, apparently a crossover combining two of her popular sleuth characters J. P. Beaumont and Brandon Walker
- With No One As Witness by Elizabeth George, 13th in her acclaimed Inspectory Lynley series of police procedurals
- The Kept Woman by Karin Slaughter, another thriller starring Will Trent
- Almost True Confessions by Jane O'Connor, 2nd in Closet Sleuth series which is apparently a grown-up spin-off of one of the author's children's books series
- Here Comes the Bribe by Mary Daheim, an installment in her Bed and Breakfast cozy mystery series
- Cinco de Mayhem by Ann Myers, an installment in her Santa Fe Café cozy mystery series
- The War Against Miss Winter & The Winter of Her Discontent by Kathryn Miller Haines, 1st & 2nd in her Rosie Winter series of historical mysteries starring an aspiring actress in the 1940s
- The Other Widow by Susan Crawford, a psychological suspense
- The Woman Next Door by Cass Green, a psychological thriller
- Murder on a Girl's Night Out by Anne George, 1st in her Southern Sisters series of mystery
- Vanishing Girls by Katia Lief, 3rd in her Karin Schaeffer series pitting an ex-NYC cop against a serial killer
@ $2.99: