[time-nuts] "Vanguard Ultra precision Golden Oscillator"

[GandalfG8 at aol.com]

The "Vanguard ultra precision Golden TCXO", their description not mine:-),  
has been listed on Ebay for a while now at various frequencies, and  the 
0.1 ppm spec caught my eye as a possible replacement for  the around 6 or 7 
ppm oscillator in a DDS function generator I've been  using.
 
One typical current auction, for a 25MHz unit, is 111071283814.
 
Has anybody tried any of these and/or come across any more data  elsewhere?
 
Regards
 
Nigel
GM8PZR