Where to sell equipment?

Hi everyone! Not a user of Flight Sim but my dad was. he passed away in January, and i’m now going through his stuff. a little about him: he had his license to fly, and when he couldn’t do it irl, he would play Flight Simulator. he recently got back into it, and would talk about where he was flying to. since he was close to retiring he went all out with a new computer, software, and gear.

I’m trying to sell his gear, as it’s pretty much in perfect condition. he used them, but for under two years. i’m also not really the type of person to get into the software myself, and i will be moving soon. I’ve used marketplace and kijiji, but so far no bites. and how much would i price each item? i’m honestly so lost, any advice would be great :) thank you!