There are two times every year that I stock up on toys and right now is one of them. I just went to Target and Walmart where I found some great deals. I buy a bunch now to have on hand for birthday gifts and then also stocking stuffers and Christmas presents.
Target has 30% off a lot of their toys. If you wait a couple days, that will go down to 50% and then 70%. I went today and looked at what they had and bought ones that I know will go quickly. For example, they are getting rid of their Harry Potter legos. I found one set that is $39.00 at Toys R Us for only $20. I also found a paper doll dress up princess set for only $4. (It is usually $15) Also, make sure and look at their summer outdoor toys.
At Walmart, they have entire aisles that are on clearance. I am not as familiar with their sale cycle but I am sure they will continue to be marked down. But I was able to get a Finn McMissle car for $2 and some spiderman dominoes for only $4. Both of those will make great stocking stuffers!
Tip: If something you like is near other clearance items, use the price scanners. Often times, they have updated the price in their systems but not on the shelves. You never know!