For a Blue Sky import, the metal on your rifle looks very decent. I've seen several from that importer that came in from SK during the mid-80s and looked like they were blasted with a very course media that excessively etched the metal prior to being reparkerized at whatever South Korean depot or shop that did that kind of work. That does not appear to be the case with yours, since the machine marks on the heel and sides of the receiver look intact and clearly visible (unpolished).
The bore appears to be corroded, so that's a definite negative as far as selling.
Totally up to you but you originally purchased your M1 to scratch whatever itch you had at the time and if you sell it, you'll probably have regrets since they only go up in value with time as they become less available. Like others have said, you may just want to rebarrel if it doesn't shoot to your liking (M1s can be a lot more accurate with good ammo than many are willing to acknowledge) and bring it up to depot-level rebuild standard when your financial situation gets better (unless you just want to sell due to an advantageous market). Ceremonial rifle or not, if the rifle was blued while in SK service, I'd have Tim Shufflin zinc parkerize it (light grey color-common with rebuilds) but that's just me.
If the gas cylinder still gauges good, you could just have it bead blasted like the Danes did IOT reduce any reflection / glare from unfinished stainless steel. The dull, dark grey color of a bead blasted M1 gas cylinder isn't unattractive to my eye at all. If your gas cylinder needs to be replaced for whatever reason (fits loose and you don't want to peen the splines on the barrel, etc.), you can still find used USGI replacements that'll pass a gauge test.
I'm not an expert, but the bolt may be correct for the manufacture date of the receiver. If not, I believe it's in the ballpark. If it bothers you, the trigger group could easily be replaced with one made by SA during WWII. Of course if you do that, you'll have a spare Winchester M1 trigger group laying around that may grow into a complete Winchester M1 since spare parts have a tendency to do that. The rebuilt "mixmasters" never have bothered me personally, but everyone's different.
Your late WWII-era M1 rifle may have some history to it: Rebuilt at least once before or after ending up in Korea. Who knows where it has been or who carried it? You may have more interest in your M1 if you overhaul it mechanically (as needed) and improve the cosmetics to look more like a standard issue, no-frills service rifle.