I'm looking at a NIB M710 on eBay.. The opening bids look reasonable..

However when I do a Google on that the M710 model number I'm coming up with
'dash' number, -21 and -22..

Would these dash numbers have anything to do with the 2182 khz alarm
readyness, DSC or Email readyness??

If I get a plain M710 could it be upgraded ecomomically??

Steve
s/v Good Intentions