I'm not sure what the final price will be but am quite happy with the finished result. It was especially fulfilling to see the toroids wind themselves, especially T1, which I was not looking forward to with its multiple windings. Pro tip: be sure to wear ear plugs during this phase of the self-construction process.
If you've never considered a self-constructing kit, I urge you to reconsider - the toroids alone make it worth the extra (small) expense despite the high-pitched noise of the magnet wire whipping about.
The kit arrived vacuum-packed and assembly commences once the kit is exposed to air.
Be sure to open the kit in a clean area with no other electronic parts within half a meter or so. If this step is skipped, the QCX will incorporate any nearby parts into its construction as it dances around the table during the process.