What is going on with Ebay and Tonka?

Not that long ago, a collector could go to Ebay and find a reasonably priced Tonka toy. No more it seems! A quick search for Tonka on Ebay today results in ridiculously overpriced toys…seriously overpriced. Why is this happening?
There appears to be a shortage of quality Tonkas in recent years. And by quality, I mean toys that are properly represented. Do you want to spend a lot on mediocre photos or poor descriptions?
I always strive to provide high resolution photos so that you can see what you are buying and point out any shortcomings…if any.