I would say it depends on what you are looking to do with everything. I always go in and give certain value to any of those parts that I need for my current project. Whatever's left I calculate roughly what I think I can sell them off for to recover as much money as I can. If I don't need any of it for a project I figure what it will cost me to purchase, then drag home, and then spend the time and hassle getting it all sold again. I like to start at the end result and work backwards to determine a purchase price.
I've found that there are almost ALWAYS trans/TC and axles left as they seem to be the last things to rot out....everyone has them and I literally have a shed full that I can't give away. Smaller stuff is easier to sell as it can be shipped.
$2k seems a little steep but it's tough to say without better pictures of everything. If all four of those carcasses have overdrives and PTO winches then all of a sudden $2k is a bargain.
And don't forget to factor in the expense of what you will have to buy your wife after she sees you set 4 dead Jeeps in your yard.
