Very cool Nick. I have yet to add one of these to my collection. I have passed on many on eBay. It seems like many offered on eBay have build issues. I would rather have one from a trusted source that has run it on steam.
You are smart to wait for a good one. I found both the beam and half beam on ebay at cheap BIN's. The beam needs work, but luckily the half beam (harder to find) is a good one. I will wait to find a better beam and sell mine on...