I went on a shopping/buying process at eBay a couple of months back in order to get a new crock for my favorite 1 qt Rival Crockette from about 1976. I use it to make oatmeal over night. I start with boiling water and set it up with salt, oats (old fashioned rolled or the Irish steel-cut oats), raisins, for perfect oatmeal in the morning. That particular type, and I waited for the ones with the removable crocks, are good. The modern little crock pots are too hot and turn the cereal to rubber by morning.

If you can get one in the $20 to $25 range (including shipping) that's a pretty good price. Lower is even better, but not found often.

SRS