I've bought a few kits just to collect. One was the Dodge Stealth Indy Official Car, because they ditched the idea of using it, figured it would be rare. But AMT popped a million of them, and the price is about one cent more than when I got it, so I built it. I would rather build than collect. The other problem, some tires melt plastic, Revell packaged the tires and plastic without bags, so when the tires set for a long time on the plastic, there is a reaction and the parts are ruined, so what's the point of calling a sealed kit valuable, when you open and find out, it's junk.
You asked about paint. Splash Paints can custom mix, send them the paint code via email, I sent a screenshot of the paint chip chart and specified which color. They have immediate turn around time, awesome service. The paint is ready to airbrush. I have not tried their primer yet, I got a bottle, or their two part clear coat. Tell them I sent you.
https://www.splash-paints.com