Cost Estimate for 2015 Dodge Charger Thermostat Replacement

Hi everyone

I drive a 2015 Dodge Charger SE, and the check engine light turned on, and it was for my thermostat being stuck open. The more I've been looking at posts about replacing the thermostat, I'm seeing some crazy high prices (like $500+).

Does anyone have an estimate on how much this might cost (and how long, lol)?

The check engine light has gone on twice for this issue (will turn on for a few days and then turn off for a few weeks). Right now, the light is off, but I feel like I should still get it fixed?? Or should I hold off? Also live in New England, so the cold weather makes me think I should fix it sooner rather than later.