Today I found the BEST deal I have ever seen by just searching 1/2 gallon mason jar. I found these:
Here is the link to where I found them. A company called Mills Farm Fleet that I had previously never heard of.
I also found these: A huge help when using jars for storage:
Just so you know, I have NEVER seen the 1/2 gallons size for this price, and all the prices seem pretty good on this site, they will likely increase (as all stores do) when canning season hits so snatch em up!