2005 Mercury Grand Marquis Resale Values
| Mileage | Trade-In-Value | Retail Value |
| Clean | Average | Rough | Excellent | Clean | Average | Rough |
| 1 - 18,000 | $10,833 | $9,682 | $6,808 | $14,075 | $13,400 | $11,633 | $9,175 |
| 18,001 - 25,000 | $10,733 | $9,582 | $6,808 | $13,975 | $13,300 | $11,533 | $9,175 |
| 25,001 - 30,000 | $10,633 | $9,482 | $6,808 | $13,800 | $13,200 | $11,433 | $9,175 |
| 30,001 - 40,000 | $10,458 | $9,382 | $6,808 | $13,625 | $13,025 | $11,333 | $9,175 |
| 40,001 - 50,000 | $10,283 | $9,207 | $6,808 | $12,875 | $12,850 | $11,158 | $9,175 |
| 50,001 - 60,000 | $9,458 | $9,032 | $6,808 | $12,050 | $12,025 | $10,983 | $9,175 |
| 60,001 - 70,000 | $8,683 | $8,157 | $6,808 | $11,400 | $11,250 | $10,108 | $9,175 |
| 70,001 - 85,000 | $8,058 | $7,407 | $5,833 | $10,825 | $10,625 | $9,358 | $8,200 |
| 85,001 - 100,000 | $7,458 | $6,782 | $5,158 | $13,625 | $10,025 | $8,733 | $7,525 |
| 100,001 - 115,000 | $6,858 | $6,182 | $4,558 | $13,625 | $9,425 | $8,133 | $6,925 |
| 115,001 - 130,000 | $10,283 | $5,632 | $3,983 | $13,625 | $12,850 | $7,583 | $6,350 |
| 130,001 - 999,999 | $10,283 | $5,157 | $3,483 | $13,625 | $12,850 | $7,108 | $5,850 |
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