House plus land

[Jay Anthony Tatum]

Hey there investors, I have a property that has a 5bdrm 4bth, and it's on an acre of land. I went to see it today and I don't know how to come up with a number to offer. Mainly because the comps aren't truly reflecting all the land in addition to the 2600 sq ft house. I'm still a newbie so I need some help, any advice or tips on how to figure this out? The guy is asking 475k, there's still some work to be done with the basement and landscape, but the house itself he put quite a bit of work into so it's not really bad.