to me, 8k sounds like a pretty good deal
i sold my 2000 XE base model for 9k with 36,000 miles (this was a year ago), so i'm 8k for a newer SE, with lower mileage is a good deal (might want to look up prices in the blue book though)
anyhow-- the sentra is a great car-- i loved my so much i upgraded to an SE-R. 🙂