issue of speaker stands

I've been using my old floorstanders as stands for my rear speakers (monitors). Figure I ought to get stands and sell the floorstanders. What are the associated issues? How much to spend, what to look for, etc? The speakers are Snell K.5-IIs. The stands need to be taller than my couch. Other than that I'm pretty clueless. Help? Thanks. -Dave
There really isn't as much to this as you seem to imagine. Speaker stands need to be the right height, and they need to be stable. (They also probably shouldn't be resonant boxes, which is why getting rid of your towers is probably a good move.) As for the right height, that's less critical for rears than fronts. Beyond height and stability, go for visual aesthetics and price.
Ummm...have you tried googling "speaker stands"?

Seriously, every audio outlet I know of, both online and brick-and-mortar, carries them. Since it's tough to judge looks and stability from a thumbnail pic on the Web, I'd visit dealers in your area first (including the big-box stores) to see what they have.