I'm actually in the market for blinds as well, mainly cellular shades. Here's our research:
We got a quote from Hunter Douglas through Costco...costs an arm and a leg for each blind. No thanks.
Next we got a couple quotes from independent third party retailers,
Calgary Blinds and Shutters and
WinDecor. Both were fairly reasonable, had very good reviews on Google. Cost a couple thousand less than HD.
Then we priced it out DIY method using various online stores,
Costco Bali ,
Lowes Bali, and
Blinds.ca. They all have some price and then a 24/7 sale that reduces the price to an average that all three of them share. For example: Costco $410 regular price, Lowes $405 on sale price, Blinds.ca $390 on sale price (this is all on Bali brand).
Our decision is to go with DIY method using Costco Bali blinds (mainly because we trust Costco the most).