You can buy surplus Trimble units for less then 60 USD shipped on ebay, tough to beat the performance per dollar.
Yes but that is not exactly plug n play GPSDO. You are buying a pig in a poke with no idea of the condition or accuracy.
If someone is trying to get a dead-nuts frequency standard and you don't have $1000 of dollars of calibrated test gear and Rubidium standard then that $60 might sounds like a deal but in the long run is it really worth it ?
I love finding a great hamfest bargain as much as the next guy but I wonder if an aging and deaf gps is really a smart move.
This new generation of GPSDO's are small, accurate, have super sensitive receivers and offer firmware updates and human being on available to help with questions.
I guess what I am suggesting is it might be fun to experiment with a bargain gpsdo board but in the long run does it make good sense financially and in regards to accuracy?
For example: You can get a BG7 setup for around $160. From what I gather from the forum they have had a wide range of every changing surplus OCXO's.
No specs, no measurement, no idea of what you will end up with.
But for $200 someone could purchase something like a Nick Sayers GPSDO with documentation, actual measurements/specs and support.
I think what I am trying to get across is to remind people there Price and there is Cost. And the lowest price might not actually be the lowest in cost in the long run.