Oh, I'm sure there are. eBay is going to be your source for that.
BUT. There is a major difference between cheap and inexpensive. Are you willing to give up the reliability and support of a known manufacturer(Samsung) for an unknown piece of junk from China? I can guarantee you're going to have no support. No updates. Nobody to help you if it has problems. It will likely have very outdated specs.
The Zmax is a pretty good phone. No bloatware, surprisingly fast and, the battery life is outrageous. No one has been able to figure how to root this phone so far. I have had mine for a week and no complaints. The dolby system is nice too.