Of course the value of a Colt Det. Special w/ pearl grips will be dependant on several variables. The condition of the pistol is of course key, also which series Det. Special the gun is; 1st, 2nd, 3rd or 4th. Finally, the finish of the revolver will also affect the value. EXAMPLE: A 3rd series Colt Detective Special, in MINT condition, NIB (new in box), and with a Nickel finish -- $1,000 Blued finish $800.00.
That really depends on the condition. Take it to a gunsmith or appraiser or go to auctionarms.com to get an idea of what they are selling for.
100-300 USD
Gun Broker " .32 IJ Detective 1900 Nickel plated, condition fair (Not a shooter)= +/- $150.
In typical condition, $150-$250
You might find them at gungrip.com
250-500
made about 1913
2010 Blue Book of Gun Value Thity-Fifth Edition on page 576 shows nickel with 95% is about $877 down to 50% nickel about $375 if original grips are undamaged. Your serial number was mfg in 1908. The real value is what someone will actually pay you on any given day.
Good condition with orig grips blue $1000 nickel $1400.
100-1000 USD
From what I was able to find, the post-1993 guns had "composite" (rubber), wrap-around grips with gold medallion.
Depends on EXACTLY what you have and condition. 100-700 USD