Quoted:
Have you seen the prices of Colt Pythons, Mustangs, 380 Auto Government Models, and King Cobras? Colt could bring back those guns and make a killing in the market.
Supply and demand - because those guns aren't made any more, the prices go way up. Colt stopped making double-action revolvers because the tooling reached the end of its operational lifetime and they weren't selling enough to warrant the immense expense of creating a whole line of new tooling to keep making revolvers. With all of the offerings from S&W - plus the lesser, cheaper offerings from people like Taurus - Colt would have a very hard time making much headway in the revolver market. Especially since it is a shrinking portion of the overall handgun market.
Now, the .380s kmight be worth it - pocket guns are VERY hot sellers these days. However, again they would be investing in massive amounts of tooling only to be competing with very well-established makes and models.
The reason for the demise of Colt's other handgun lines is simple ecomonics - it didn't make business sense to invest in new tooling with such little demand for those products from that company.
Also, my Colt Repro-70 is damn near perfect in every respect. My first NRM Commander - still off with Bob Miller - was nothing short of perfect reliability-wise before it got sent it in for the full custom carry treatment.