Joe,
You can have xenia for free. I have three different types.
As for zoa, I have some AOG, Nuclear Green, Bam Bam, Eyes of Rah, Purple Death, Tubs Blue, etc. in varying sizes. My prices are not high. For example, $15 for a plug of AOG with 6 polyps, or $15 for a plug of 6 Nuclear Green and a single tubs blue (a hitchhiker, LOL). I also have no name pink zoa colonies and no name bright green zoa (probably the same as Radioactive dragon head), too.
Tomoko