If you're thinking about purchasing Adobe Photoshop CS5, the Adobe Store has the full product on sale for USD$599.00. At Staples, these normally retail for CAD$799.99.

You could also try to use the code BLKMON50 when checking out for an extra USD$50 off. Not applicable with other discounts, so it may not work, but it's worth trying.

Other products on sale include

Adobe Photoshop Elements 9 & Premiere Elements 9: 94.99
Save US$55 (US$25 instant discount with offer code SAVE2010 plus US$30 mail-in rebate)
Note: retails for CAD$189.99 at Staples

Adobe Photoshop Lightroom 3: USD 199
(Save US$100 off the standard price of a full version)
Note: retails at CAD$322.99 at Staples

Adobe Photoshop Elements 9: 49.99
Save US$50 (US$30 instant discount with offer code SAVE2010 plus US$20 mail-in rebate).
Note: the $59.99 Staples deal posted yesterday may be better if it qualifies for the mail-in rebate

Offer begins November 24, 2010, at 8:00 a.m. PST and ends November 30, 2010, at 5:00 p.m. PST. When purchasing through the online Adobe Store, you must enter offer code SAVE2010 in the shopping cart prior to checking out when prompted to do so. To purchase by phone, call 800-585-0774 and mention offer code SAVE2010. Savings are limited to one discount per product per customer. This offer is available only to customers with shipping addresses in the United States, Mexico, and Canada (Quebec excluded).