Yep, +1 for Victor's oscillator in the eBay link above. It is the real deal.
His oscillator has been pretty thoroughly reviewed over the last couple of years in (the middle of) this massive audio oscillator thread over at diyaudio.com where I usually post:
http://www.diyaudio.com/forums/equipment-tools/205304-low-distortion-audio-range-oscillator.htmlSeveral posts from Victor himself in that thread. Folks over there have checked his oscillator with high quality audio distortion analyzers from Audio Precision, Panasonic, and Shiba Soku and his low THD claim checks out. Victor has even made a small improvement about a year ago and lowered the THD even a bit more. If you contact him he can custom-make other frequencies too. I have a 1KHz, 10KHz, and 11KHz, the last two being handy for IMD tests.
I have a DIY power supply & case project for it over there too which can hold up to 4 Victor boards.
His board takes 35V in, you can just use a lab supply which is what a lot of folks do. His board uses kind of a unique power supply setup, forming its own ground between the two TL431's. Important to note that the Victor board ground will be different than the supply ground feeding it.