You have to know what your doing, research the model that is being offered. Best bet to buy a notebook is off of Ebay. Quite a few respected sellers that deal predominantly in ‘just off lease’ machines. Besides that you treading in dangerous waters unless you do your homework exceedingly well.
Same with computers and cars, if you dont know them well, you shouldnt’ be alone or receive advice from similarly minded ‘not know’ people. best I can do!
I omitted it earlier but my D620 was $300 a year ago.
Now the D820’s are coming off lease for $300-350 on Ebay
very good info you have provided- I bought this DELL LatD600 3 years w/WIN XP pro