American Flyer Train Set? How much is it worth?

[Trucklover]

Hi guys, my grandfather has a friend that has an old American Flyer Train Set that he got when he was a little kid and has held onto ever since. Its been safely stored away for years. I believe it is HO scale and he said it is in excellent condition. He said he only set it up and played with it a few times when he got it.

What does a train set like this go for these days? I dont have any pictures of the set yet, but i just wanted to see if anyone here knew what it was worth?

Thanks in advance,