Yes, this is the way to go. Another good place to shop are yard sales/garage sales. . .
Church rummage sales also seem to have at least 1 crock pot of the kind I like: the old ones without all the timers/electronic bells and whistles. Try to find one with just low, medium and high settings.
ALSO, have you chatted neighbors up? I know a lot of people get these as gifts and such, try them once and into a cupboard they go. If you are member of any sort of group, let the group know that you are looking for one!
Another source: Search Walmart for "crock pot". I found a 4 quart for $16.88.
And amazon.com: a two quart (says it will serve 3+) brand name Crock Pot for$15.93, free shipping (click on the link in the phrase "Available from these sellers" (the link is in the words "these sellers".