shaft

I'm starting my tonka trucks collection. I loved these monsters when I was a kid. I had a couple of these big dumps trucks when I was a boy but unfortunately I have no idea what happened to them. I would love to have these great toys again.

If you have a collection, can you educate me on the do's and dont's, what I should be looking for if I'm purchasing one say, in eBay and the money I should pay for these toys. If you have pics, that would be great too. I did a search in the internet but did not find a lot of info. If you know a web site with great information please let me know. Thanks.