Para-Ordnance introduced the LDA (Light Double Action) action system in 2000, IIRC. It remained in production until Remington (which had bought out ParaUSA) killed off Para in 2015 or 2016.
There's no way to know when it was made without a serial number, and even then it's only approximate as I don't think anyone has created a definitive serial number look-up for Para-Ordnance pistols. If it says "Para-Ordnance," not "ParaUSA," on the slide, it was made in Canada before Para moved production to North Carolina and renamed the brand ParaUSA. That would have been around 2009. The Para-Ordnance name would make it a fairly early LDA.
I think they are good pistols, but virtually none of the fire control parts interchange with a standard 1911. I don't think there's any premium for them. If anything, especially the .40 S&W models, are probably worth less than a comparable Para-Ordnance single action of the same age and condition.
Remington does not have any parts for it -- they sold them all to Sarco and Numrich. Last I knew, Sarco still had for sale kits of "essential" LDA parts. I would advise you to grab one of those kits. If you keep the gun, it will be invaluable. Even if you sell it, the spare parts kit will probably at least pay for itself and could be used as a selling point.
I bought a Para 12.45 LDA new in 2001, the second year they were available. The 12.45 has a 3-1/2-inch barrel and the thing was scary accurate for a compact pistol.
Does yours have an 'X' in the serial number? If so, that would indicate that it has Para's proprietary "Power eXtractor," which came out around 2004. So the presence or absence of the Power eXtractor would also help to narrow down the production date.
