Office Max: 100% store credit rebate when you buy up to 2 backpacks.

Now Office Max is jumping on the excessively-complicated-backpack-rebate bandwagon, too - and you can do the offer for up to 2 backpacks, if you want to make it even harder on yourself. No gift cards for this one, though - you have to already be enrolled in their MaxPerks rewards program.

1. Purchase up to 2 backpacks and earn the purchase price back in Bonus Rewards (to be spent at Office Max).
2. Rewards earned for the backpack offer will available in a member’s account in September; Bonus Reward for MaxPerks Rewards for Teachers members will be available in October.
3. All other Bonus Rewards will be available in a member’s next statement. MaxPerks enrollment required.

Offer is good through July 31, if you're willing to put the work in on this one.

Staples: 100% gift card rebate w/backpack purchase, 7/25-7/31.

I'm sort of torn about this Staples rebate offer. On one hand, it sounds pretty great - buy any backpack and get a 100% rebate! BUT there are some important caveats:

1. You get the "rebate" as a Staples gift card, not as cash or a prepaid debit card usable anywhere;
2. Their backpacks are a LOT more expensive than elsewhere.

For example, the classic Jansport Superbreak in black is $49.99 at Staples, but only $24 (with free shipping) at Amazon and $29.99 at eBags. If you go through a lot of office supplies, maybe it's worth it to pay twice as much if you'll eventually get it back in merchandise. But if you just want a good price on a backpack, I'm not sure if this is the offer for you.