Hi Karol,
Great forum here isn't it?
I only looked at your old salesletter version that was having difficulty with Adwords. And before I make a comment or two, let me tell you this, I just tested Adwords on a page that I have, and it pulled a miserable 0.01% (one tenth of a percent), whereas the EXACT SAME PAGE is constantly pulling 8% with the same organic search results from Google, that's 80 times better!!! Go figure! With recommendations the same page is pulling even better than 8%.
You might be looking at a simple traffic problem here. I dropped Adwords.
With that in mind, I have a subtle observation that may or may not help.
Your headline:
"Who Else Wants To Know The Well-Guarded 'Secret' Methods For Finding REAL Wholesale Products That You Can Quickly & Easily Use To Make Huge Profits On eBay™?"
"Who Else Wants To Know" doesn't do it for me.
I would try a minor change:
"Discover The Well-Guarded 'Secret' Methods For Finding REAL Wholesale Products That You Can Quickly & Easily Use To Make Huge Profits On eBay™"
It seems clearer and easier to read this way to me - again, subtle change, and I honestly don't think it will help your Adwords CR%, but it might slightly help in other areas... worth testing in my opinion. Otherwise, I don't see anything wrong with your letter - in fact, I was just talking to a friend yesterday about this subject, and now your letter came up, who knows maybe I'll get it...
I hope this helps,
Tim