@effy
I am interested in buying a 2nd hand Mediator. It is a rev.1.0 board. Anything wrong with that or should I go for it 
If its one of the first boards (look at the serial number) you may have to set the memory window to 4MB to make it work correctly. Unfortunately I dont know anymore which serial numbers these early boards have (I think its also written in some readme file).
In regards of support, as this is your 2nd mediator board you are most likely already a registered mediator user so there wont be any problems with drivers ect.. at least this is what i have heard from the guy who once bought my mediator1200 at ebay..