This is the reply form the guy
"I have allready updated the software using my own sd card and downloading the update from the garmin website as it was also out of date.This was easy but you still have to pay to update the charts"
I'll ring your linked number tomorrow and find out about it all before I buy - thanks
Have to say, I'm not too worried as I use paper IMRAY updated charts as well and my sailing is only along the South Coast, mainly Solent so nothing too adventurous.
Crossing the channel would be a big achievement for me - it would a damn site quicker in a RIB!!