Hey Gal,
I know your feeling, and believe me, every one feels the same way at some point.
But the thing is, many of those list builders out there, I mean 99.99% wont like to sell their list...Why?
1) Long term --> Building a list means long term profits. List builders provide great content, free ofcourse, to their lists for weeks, even months, without a single promotion. Results?
One of the very reputed internet marketers, valued his list at $10 per lead!
Yea, imagine that. $10 for every subscriber.
Now, what makes you think he will give it away for a fixed one time price when he can make money with it any and every time he wants, that is, unlimited ofcourse.
2) Not allowed? --> Have you seen this kind of text written near optin forms
"Ï know you love your privacy, and thus, we promise your information will not be shared"
That says it all I guess.
I know its kind of irrelevent, but if you'd like to build a list, it is very easy, but requires determination, hard work and most importantly, patience.
Build a squeeze page, write articles with a link to it, and thus thats your list!
Once you build a small one, go ahead with JV partners, banners, SEO(Rank your page on Google) and other stuff, not to forget, the most laziest, Adswaps :P
Hope it helps
Cheers
Sim