Big Buck, Current (2011) Collectors Handbook values for sets are as follows:
Colt Model Civil War Grant - 100% - $800; 98% - $525
Colt Model Civil War Lee - 100% - $800; 98% - $525
Colt Model Civil War Grant + Lee double cased - 100% - $2000; 98% - $1300
Colt Model Conquistador - 100% - $3250; 98% - $2125
Colt Model Butterfield Overland Stage - 100% - $1000; 98% - $650
Colt Model Interstate Edition - 100% - $3750; 98% - $2450
Colt Model 1862 Pocket Navy - 100% - $750; 98% - $500
Colt Model 1862 Pocket Police - $800; 98% - $525
I didn't include value for New In the Box (NIB) sets because the chance of you finding a set with all the original packaging is slim to none. NIB would add 15 to 20% to the 100% value. Prices realized have been pretty much in line with estimates; but, you can sometimes find a real deal.
You might want to get 'Colt Percussion Revolvers - The Second Generation Collectors Handbook and Pricing guide #6' from Dennis Russel. It's $34.95 plus postage from:
Dennis Russell
3162 Johnson Ferry Road
Suite 260-607
Marietta, GA 30062
Here are pictures of some of my sets:
Baby Dragoon, 1860 Army, 1862 Pocket Navy & 1862 Pocket Police 1 of 500 sets
Cavalry Commemorative, R E Lee, Bicentennial, and U S Grant cased sets
Grant/Lee matched pair cased set (with all original packaging)
And the Buttterfield Overland Despatch commemorative set
I haven't acquired a Conquistador or Interstate set............................. yet