I noticed there are some Mac Pros there as well. Those might definitely be worth looking at as well, especially if any of them are the Early 2008 models (that model, I feel, is probably one of the most versatile of the original Mac Pros, as it can run every OS from Tiger (with ATI Radeon HD 2600 and some hacking to the drivers) all the way through the current OS, and it can support 64 GB RAM, fast-enough SATAII (or SATAIII via PCI-Express), AND a modern video card!)
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