2005 Porsche Boxster Resale Values
| Mileage | Trade-In-Value | Retail Value |
| Clean | Average | Rough | Excellent | Clean | Average | Rough |
| 1 - 18,000 | $31,550 | $29,775 | $23,592 | $36,588 | $35,262 | $32,900 | $28,338 |
| 18,001 - 25,000 | $31,450 | $29,675 | $23,592 | $36,488 | $35,162 | $32,800 | $28,338 |
| 25,001 - 30,000 | $31,350 | $29,575 | $23,592 | $36,312 | $35,062 | $32,700 | $28,338 |
| 30,001 - 40,000 | $31,175 | $29,475 | $23,592 | $36,138 | $34,888 | $32,600 | $28,338 |
| 40,001 - 50,000 | $31,000 | $29,300 | $23,592 | $35,388 | $34,712 | $32,425 | $28,338 |
| 50,001 - 60,000 | $30,175 | $29,125 | $23,592 | $34,562 | $33,888 | $32,250 | $28,338 |
| 60,001 - 70,000 | $29,400 | $28,250 | $23,592 | $33,912 | $33,112 | $31,375 | $28,338 |
| 70,001 - 85,000 | $28,775 | $27,500 | $22,618 | $33,338 | $32,488 | $30,625 | $27,362 |
| 85,001 - 100,000 | $28,175 | $26,875 | $21,942 | $36,138 | $31,888 | $30,000 | $26,688 |
| 100,001 - 115,000 | $27,575 | $26,275 | $21,342 | $36,138 | $31,288 | $29,400 | $26,088 |
| 115,001 - 130,000 | $31,000 | $25,725 | $20,768 | $36,138 | $34,712 | $28,850 | $25,512 |
| 130,001 - 999,999 | $31,000 | $25,250 | $20,268 | $36,138 | $34,712 | $28,375 | $25,012 |
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