Even relic Walker Colts (those dug up in a field etc) are worth many many thousands. There are charlatan out there who modify replicas to get suckers to buy them as originals.
I own a Uberti replica. I have fired it. Fun! Damn thing weighs a ton though . It is often called a horse pistol because it was best carried attached to a saddle pommel.
Soon replaced by the slightly smaller Dragoon. But the most popular soon was the 1851 colt navy. Like the brace that Bill Hickok carried
The “Walker” was named after “Walker: Texas Ranger.” Yep, Colt was nearly broke, his company closed, when a group of Texas Rangers armed with Colt pistols fought off a much larger band of Indians in Texas. Walker wrote Colt, suggested changes that would simplify the design and make it more reliable. The Mexican War began and immediately Colt was back in business with his re-designed Colt “Walkers.” As I recall, the Army ordered 6,000-—at a time Colt didn’t even have a factory!
“Even relic Walker Colts (those dug up in a field etc) are worth many many thousands...” [Vaquero, post 2]
https://www.thefirearmblog.com/blog/2018/04/24/rock-island-april-2018-premiere-firearms-auction-sets-10-world-records/
Last April, an original Walker Colt sold at auction for $1,840,000.00. Highest price for any firearm, highest price for any Colt.
Extra-rare: highest-condition Walker (one gathers), civilian, cased set, rock-solid provenance. Includes original bill of sale handwritten by Sam Colt himself.
3D-printed inert replica, made of plastic. Supposedly identical, except for the non-gun material and colors. A bit less pricey.