i'm looking at buying an '02 620 w/ only 3500 miles on it. the seller is the 2nd owner of the bike. i'm assuming it hasn't seen service yet because of the low mileage. even though it's not due for service in terms of mileage should i be concerned about replacing parts / servicing simply because of the age? the mileage indicates about 440m per year (not necessarily spread out). asking price is $3650. any thoughts are appreciated.