Where you been? Almost impossible to find 5830s, 5850s, and 5870s. Anyways, not every card is at cost. The 6950, 6970s are discounted. I might lower the 6870 but probably not. It has more value then just mining. I'll more then likely just ebay them as people expect a lower price here because they aren't as fast miners.
Kylesaisgone was offering 130$ for a 6870 in another post which is just plain ridiculous.
And the power is residential rates.
I really don't comparison shop much. I bought my 6990 on a whim about a month ago for $749 - I did have to order it about a week in advance but to be fair I also ordered a 70 lb printer and I'm pretty sure that took longer to source than the card. NCIX seems to have 5830s and 5850s but at a significant premium to what you're offering. I can't tell if this is their regular price or the result of problems sourcing the part. Anywho I wasn't complaining at your prices just surprised because the GPU shortage hasn't hit Canada yet.
In fact considering that your shipping is reasonable - were in the market for another card I'd probably buy from you just to take the advantage that CDN is holding over USD.
But right now I'm trying to keep it down to two rigs and I'm having trouble getting my NVidia cards (which I use for folding) and my ATI cards (which I use for hashing tasks) all in just two boxes. Maybe if Stanford releases a folding client for ATI with decent performance I'll scrap all the GTX's. :-)