National Parks Issues Trial Proofs?

Something about these national parks trials don't seem quite right.. But interesting just the same. What do you think?

http://www.ebay.com/itm/US-740-749E...em1e668b8bc0

I think there is a button "Buy it now". I don't think if I have the cash I would buy it but if you like it very very much and you have the cash just click on the button and these essay are yours. You can put them in frames and decorate where you live. You don't have to say how much you paid for them to your friends. I'm afraid they just can be reproduction. My feeling is that real essay for these stamps would cost much much more. Daniel

Trust me, I know how to buy stuff on there..just ask my wife (I'm an ebay head from way-back -lol)
I was just curious as to the authenticity of them. If I thought for a second they was real they would already be en-route to my doorstep! I just wanted other opinions and perhaps a little background on these issues. They are my favorite besides the pictorials...and the 1902 series and the....

I_LOVE
I maybe not of good advice. I never ever collect US stamps neither essays. I just don't understand the description "printed drawing by Harry". Something to buy would be the original drawings by the artist but they are probably in a museum or own by a wealthy collector. I just think essays collecting is just another area of philately i'm not about to explore.

Thank you your advice is sound. Thank you.

These are not Essay's or Proof's just Harry Peckmore Engraving's. These are available on the market and normally sell for $50-$100ea. So, the price is not crazy. Nor, is it a great deal!

rev
This was my feeling and you bring more info. "Large die essays" it's a large seller too. I wo wo wonder why.

Point taken. Depressed today no mail for Jeffy... :[