Cheapest? What do you consider cheap? Cheap-cheap = ubid. A month back, they had some stands for about $9/pr.
If you want inexpensive and fairly good ones, check electroshops.com. I got some Sanus natural foundations (oak posts, black bases) for less than $100 and free shipping.
I use plaster columns I bought unfinished from Garden Ridge. About $13 each plus a can of $5 textured sandstone spraypaint.
Click on the link in my signature, and you should be able to see a few pictures that include the stands. They are cheap, look good, do NOT resonate. They are a DIY project, but fairly simple.
John
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System:
Onkyo 787
Mains: nOrh SM 6.9 (shipping NOW)
Center: nOrh marble 4.0
Surrounds: nOrh wood 4.0
Rear Center: nOrh prism 4.1
Subwoofers: 2 x SVS 20-39 CS w/Fidek Amp
Pics: http://www.geocities.com/givinit2him/