You don't understand xD If the publisher wanted to add MS for 6$ then it was worth 6$. It doesn't matter how much collectors want to pay for retail version. It is important how much the publisher wants for his game.

Actually what the publisher wants for a game doesn't reflect the value of a game; a game (or anything for that matter) is worth only as much as someone is willing to pay for it. Weclock's example of Mean Streets was a case of asking price being inflated due to a limited supply. Basically, different people value products at different prices; there may be 20 people willing to pay $100 for a game, and 20,000 people willing to pay $6 for it. If you only have 20 copies of the game to sell then asking $100 for it will get you more money. However, if you have 40,000 copies then asking $100 will get you far less money than asking $6. The publisher gets to set the price for a game, but the purchasers get to determine what the game is worth, and if a publisher wants to maximize their revenue then their asking price will heavily take into consideration what purchasers value the game at.

did I ever mention how much I love you?

Yes, I absolutely agree with that. Maybe I should use word 'price' instead of 'value' but I was thinking that it's not a problem ;)
So let's try again: I just want to say that if publisher doesn't want to agree for lower price, we should wait until he will change his mind. And sorry for this confusion :)

And GOG has been pretty terrific in doing this so far. I think if they announced a higher price point, it would mean they wouldn't have to work so hard, and like I illustrated earlier, the only way we can get a lower than $5.99 price point, is if we allow for a higher price as well.

I don't think so that GOG wants to sell games for less than 6$.

Then you haven't been paying attention. Marcin said in a recent interview that they were thinking about making prices lower than $5.99 but that the stipulation would be a higher price would also be introduced.
PAY ATTENTION.
Here is the article

Come on, people - five is better than two. It also offers more hope for future permanent price drops: .99 -> .99 -> .99 -> .99 -> .99.
Damn, it seems that the only point anti-five people make is this:
"http://www.gog.com/en/forum/general/Activision_announcement_short_sum_up/perm=40/#p_b_40]1* Every publisher that used $12.99 would use $9.99 if only two price-points existed.
2* Every publisher that used $9.99 would use $12.99 if there we more price-points available.
3* GOG would agree to such terms without trying to negotiate a better deal.[/url]"

Maybe that's not so bad idea. You managed to convince me ;)

Alright, you convinced me. But I don't think I didn't warn you....

Well, I'd like to say my faith on this point is somewhat renewed. I still don't understand why a game old enough to be here would have to cost more than $10, but GOG knows its stuff and I trust them to always offer good, if not great value. So, it's not much of a concern for me anymore. :)
Aaand..if I personally find something too expensive, I'll just wait for it to hit $10 or $6.

GOG has three things going in its favor that most other digital distribution outlets don't.
1. Nostalgia. Extremely old games that many of us remember playing long ago, and would absolutely love to play again.
2. Extras/fixes. Now all of these nostalgic old games can run on modern PC configurations without those pesky bugs and glitches. On top of all that, you get copies of all the goodies that came with games back when the boxes were huge, the manuals were thick, and reference cards and maps were commonplace.
3. Value. I can show up on GOG one day and walk away with a game for the price of a fast food meal, and it will both last longer and be far more satisfying.
Anything that is done to infringe upon any of these points weakens the site as a whole. I can safely say that there are only a few games I would throw down more than $10 for in the field of possibilities for GOG, and there are all too many sales that could be lost through overpricing.

It depends, obviously, on the concept of "old" game. In today scenario, a game published in 2006 like Oblivion is an old game and the possibility to download here a DRM- FREE Oblivion Goty (+ expansions) with the option to install also FM convergence without hassle is worth $29.99 as a minimum.

Now? Why do you say that?
Is it the countdown?