I admit, fitted diapers are not the cheapest things in the world. Then on top of it you have to buy a cover! (Although you do not necessarily need one cover per fitted diaper depending on whether you use them during the daytime or nighttime). Here are some things I have found for getting good fitted diapers at a cheaper cost.
1. Try to win them. Takes a little time to enter but if you win then you get a fitted or two for free!
2. Make them. Either from a prefold diaper or from fabric. Depending on what fabric you get, how much, and from where it may be the cheapest option. Or, if you have a bunch of prefolds lying around that you don't use you can always turn them into some nice fitteds! Check the links below to find directions on sewing.
Prefold to Fitted
Sewing a Fitted
3. Check Etsy. Etsy is full of WAHMs and sometimes you can find a real gem for a low price. My all-time favorite fitted diaper is made by handsewnbyme and sold on Etsy. These diapers are cloth inside and out with layers of zorb in the middle. Very absorbent, cute, functional and cheap! Only $8.25 for a large + very reasonable shipping.
4. Check Ebay and other resale diaper sellers. Be careful of the quality. When I was checking this out, my first thought (I admit!) was that there is no way I want a diaper someone else used! But then I found that if you look frequently (as they get snatched up quickly) you can find barely used diapers that someone bought to try and ended up disliking. Just make sure if you bid on something that you don't bid over the limit of what it would cost you if you bought brand new!!
Those are my tips and what I usually do when buying diapers. If you have any other suggestions, please feel free to share! Happy Diapering!