Cotton Babies routinely runs sales on "seconds", merchandise that is not perfect, but has minor enough flaws that it is still functional. Right now there are a number of items on Clearance from Cotton Babies, which is a great way to add to your cloth diaper supply.
The Flip covers for $9 caught my eye, as well as the bum Genius 4.0 covers for $10! Neither of these come with inserts, so be aware of that. There are some organic flip inserts on sale as well.
When we went from one to two in cloth diapers, we opted for the Flip system. Not only is it cheaper than the full pocket diapers, but you need less covers since they can be reused without washing, and since the Flip is a bit more streamlined, it fits a little bigger than the pocket diaper. For more of my thoughts on the Flip diapers, check out this post.
I really would love to upgrade some of my 3.0 bum Genius diapers to those new 4.0 covers that are just $10, and it is so tempting when Cotton Babies runs a great sale like this. We decided that our diapers, while showing a good bit of wear, still have plenty of life left in them. And now that E is potty trained except for overnight, we have extra diapers on hand! So I'm passing up another great deal because for us right now the thriftier option is to spend nothing, even when it's on clearance.