Why? You are talking about a pistol that groups 5-8" at 25 yards, has tiny sights, "iffy" magazines, rough trigger pull, and production tolerances that no consumer - in fact, no Army - would accept today. Civilian M1911A1 clones fans talk about the "advantage" of being able to carry cocled and locked, but I never knew ANY Army officer or NCO that carried that way - because they were worried about accidental discharges. Our few remaining WWII vets are now too few and too old to tell all the stories of people shooting themselves and each other, or of emptying an entire magazine at an enemy - and missing. The theory at the time was that you would at least scare him to death.
The USGI guns are in virtually every way inferior to modern guns - except they're authentic. Serious collectors heap scorn on the Colt and others, because of the price, and the fact that they've made some changes - such as polishing the feed ramp.
As you can get a USGI "shooter" for around $600, a nice WWII USGI psitol for around $1,000, a Sistema for $350, and as you can get brand-news USGI surplus parts for just about everything except the frame, you could build up a "new" M1911A1 of authentic parts. One of the appeals of the M1911A1 is that just about anyone can completely strip one - and the instructions are in the FM. I carried several, and I collect them now. BTW, I'm a lefty but shoot handguns righty because when I started shooting them in the Army there was no way you would ever be able to change magazines lefty, and live.
If you're not going to shoot much, buy an authentic M1911A1. If you are going to shoot, buy a modern version that has a nice trigger pull, good sights, good slide fit, much more robust toggle, larger, polished feed ramp, flared magazine well, no lanyard loop, nice grips, ambidextrous safety, nice magazines, and probably better resale value.
Don't listen to some of the M1911A1 clone fanatics, who have romanticized the design and capabilities, largely based on the hundreds of improvements made to the design since it left Army service. Buy a new one, or buy an old one - but don't get caught between the boat and the dock.
Have fun with whatever you get!