Depending on what you're looking for in perticular, there are several blogs out and about that offer free printables that you can use for scrapbooking or really anything. You can make them into stickers and personalize things to suit each individual scrapbook.
Some of you may know of:
The Graphics Fairy
(
http://graphicsfairy.blogspot.com )
The Vintage Moth
(
http://thevintagemoth.blogspot.com/ )
And my own blog (in my signature), though just starting out, may have something to offer a scrap-booker.
Also - there are loads of etsy stores that have sales all the time that sell scrap-booking paraphernalia. I find that a lot of the crafters that use Etsy that also advertise with Project Wonderful, will advertise for short periods of time that their etsy store is having a sale - so sometimes you just have to click from link to link to find things, like a massive scavenger hunt - but when you find just exactly what you're looking for, it's completely worth it.