Tough to answer without a physical inspection. Based on pics alone, $1,000-$1,250. If it's to be a shooter then a thorough exam by an experienced gun smith would be necessary before a final price. If it's a wall hanger then absent any historical significance $800-$900. First generation prices can fluctuate a bit depending on the condition and historical importance. Nettleton Colts in good shape can go for $9-10,000 while run of the mill Colts can be had for less than $1,000. There is a Colt Collectors Forum web site where you might get a better idea as to value.
The serial number puts the manufacturing date in 1893. Based on that date, it looks to be in good shape. In the end, it's up to you to pay what YOU think its worth to YOU.
BTW, the cylinder pin seems to be partly out of the frame, but it's correctly seated in the third photo.