That's called inflation. $2,000 in 1957 was $17,000 equating for inflation. You could easily buy a house for $10,000 in 1957 money. Yes, it's worth money because it's a collectors car relative to most other cars, but it's still worth less than it was originally purchased for.
I can think of ONE "mainstream" used car in the U.S. That has appreciated in value in a short amount of time. The Land Rover Defender 90. It was imported in 1994, 1995 and 1997. They cost ~$30k new. Since they are so rare, their prices despite age and high mileage can still be $40,000-50,000 (maybe up to 70 with low miles). Their prices have been in the 40-50 range for at least a decade. The 110" long wheel base you could get in 1993 and they imported a handful. They're usually listed anywhere from 90,000 to 110,000.
A Daewoo is by no means iconic and may one day will be worth more money (because none will exist) relative to today- but that will be decades if at all. Considering you have issues getting parts for it now, good luck 30 years from now (esp. Given your reliability record). Michael Scott in The Office drives a Chrysler Seebring, it doesn't mean it's iconic.
There is really nothing particularly interesting about a Lanos. It's not stylish, it's not luxurious, its not powerful, it's not revolutionary. It's place in automotive history is really insignificant. It's a 4cyl FWD shottily built economy car that no one wanted in 2001.
Don't get me wrong, I love your enthusiasm. I completely understand the passion and your open to your opinion. In terms of the general public though, the Lanos isn't something that will be remembered- like a DeLoreon, MG's, Austin Healies, Triumph TR6, Jaguar XK or XJ, Range Rover Classics, Land Rovers Series 1-3/Defender, Corvette, Mercedes SL, 1980's BMW 3-Series, Jeep Wrangler or Wagoneer, Toyota Land Cruiser, etc etc
You'd be dreaming if you think you're getting $2100 for a car that needs ~$1000+ in work. You'd get $1000 if you're lucky. You'd be delirious to think ANYONE would buy a Chrysler LeBaron for $6500. What people advertise and what cars actually sell for are two very different numbers. I don't think $1000 is even a good price considering the age, mileage, and intrinsic value.