X-link to the DRM-free megathread, where there's a few items of sfnal interest on sale:
For 99 cents, you can get the anthology
Across the Spectrum: Book View Café’s 5th Anniversary Celebration which collects about 2 dozen mostly science fiction/fantasy stories by assorted Book View Café members, which include quite a number of previously-published stories by established authors, some of whom are quite prominent in the genre.
They've also some other discount deals.
And Pan Macmillan Australia's Momentum imprint's 70% off CyberMonday sale is well underway, in case you've been enjoying those sporadic reprints of Australian sf/f 1st-in-series they've been giving us and wanted to pick up more.
IIRC, Momentum books are not couponable at Kobo (at least, not in Canada), so this is probably the best chance of a good discount unless they end up running $1 specials for anything you had your eye on.