Yes they do loose their value, the guy i purchased it from brought it for $12,00 in 2001, has barely driven it and i just brought it for $6,200. But if i have it for 5 years, it really doesnt bother me that much. Excels are like assholes around where i live - everybodys got one.
The warranty will transfer with the car. it is a 5 year/ or 150,000 Kilometre warranty. which i thought was pretty good.
It drives much better than the Daewoo did, it has a twin double over head cam on it and it has power steering too.