2004 Buick Century Resale Values
| Mileage | Trade-In-Value | Retail Value |
| Clean | Average | Rough | Excellent | Clean | Average | Rough |
| 1 - 25,000 | $7,830 | $6,600 | $4,035 | $10,800 | $10,075 | $8,225 | $5,875 |
| 25,001 - 30,000 | $7,730 | $6,500 | $4,035 | $10,700 | $9,975 | $8,125 | $5,875 |
| 30,001 - 40,000 | $7,630 | $6,400 | $4,035 | $10,600 | $9,875 | $8,025 | $5,875 |
| 40,001 - 50,000 | $7,530 | $6,300 | $4,035 | $10,450 | $9,775 | $7,925 | $5,875 |
| 50,001 - 60,000 | $7,380 | $6,200 | $4,035 | $9,850 | $9,625 | $7,825 | $5,875 |
| 60,001 - 70,000 | $6,730 | $6,050 | $4,035 | $9,200 | $8,975 | $7,675 | $5,875 |
| 70,001 - 85,000 | $6,130 | $5,400 | $4,035 | $8,750 | $8,375 | $7,025 | $5,875 |
| 85,001 - 100,000 | $5,680 | $4,800 | $3,385 | $8,300 | $7,925 | $6,425 | $5,225 |
| 100,001 - 115,000 | $5,230 | $4,375 | $2,785 | $10,450 | $7,475 | $6,000 | $4,625 |
| 115,001 - 130,000 | $7,380 | $3,925 | $2,360 | $10,450 | $9,625 | $5,550 | $4,200 |
| 130,001 - 150,000 | $7,380 | $3,475 | $1,910 | $10,450 | $9,625 | $5,100 | $3,750 |
| 150,001 - 999,999 | $7,380 | $3,025 | $1,485 | $10,450 | $9,625 | $4,650 | $3,325 |
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