There are a number of discounted omnibus ebundles from Tor Books available for $2.99 at some of the usual US suspects. I recall some being mentioned here previously, but I don't believe all.
Some examples:
The Adventures of Arabella Ashby, David D. Levine (confirmed also at
Kobo US)
The Strangely Beautiful Saga, Leanna Renee Hieber
The Dragon Corsairs, Margaret Weis & Robert Krammes
Yesterday's Kin Trilogy, Nancy Kress
Breaker of Empires, Richard Baker
All told there are maybe ten of these, so if someone who's better at the search-engine-fu than me knows how to assemble a good search string, it may be worthwhile.