u/Vegetable_Library_38

Hello all, I was considering purchasing a used Trek Marlin 5 2024 from my local bike store. It's only had one owner and who they sold it to and judging from the tires it looks like it's been ridden less than a half a dozen times. I'm 6'4 and the bike felt nice to ride. They are asking 600 for it used and I saw online that perhaps it could be between 350 and 500? I wanted to have more information before I went back tomorrow to negotiate. Any help or advice would be appreciated. I was kind of confused when I was looking on eBay I saw a similar listing with what seemed to be the same frame but it said it was from 2018?