If they're grey/green, have a chance for a decent slice, strong other secondary stats as well as the 5 speed (offence, health, protection... stats I need for other toons), then I'll keep them for now, and we'll everything else.
I am getting to the point any mod without 5+ Speed (apart from those 100+ offence, 1500+ health/protection utility mods for tanks, raid loadouts...etc) I sell in a heartbeat.
I am farming speed mods again. I moved to farming slicing materials to slice up all my mods. Now I'm lacking speed mods for my new toons that I've been farming following the massive influx of new farmable toons.... so I've gone back to farming mods to get some decent sets.