In my opinion, there are two ways of approaching this.
1) The stock market model
If the market price for these lenses are well above retail, I can't see the problem with selling them at these inflated prices. What is the alternative? Sell them at a more "reasonable" price? In that case, you're just leaving profit on the table for the buyer. If I'm selling a lens, and there is profit to be made, I'm not gonna give that profit to some guy on a forum, which I never met (or will meet) in real life.
2) The artist/photographer model
Cameras and lenses are to be purchased by photographers who are gonna use them, not people investing in them for later sales.
The problem with Leica is that if you keep anything for a year or two, you're more or less doomed to make a profit. Of course, you can choose to give this profit to the next guy, and only charge what you paid for it (or less), that is up to you.
Everyone has the option of getting on a waiting list for these sought after lenses, it's not some secret club. Personally, I believe that Leica should raise the prices with immediate effect. To me, as a Leica user, I would highly prefer the profit to go back into the company that design and build these lenses - not some guy with a business model.
If some of you happen to be in Norway/Oslo, visit Interfoto - they have a 50mm Summilux ASPH in stock. After you deduct the VAT, you'll pay around $3900. A bit above retail for you US guys, but at least better than some of those $5000-lenses I've seen floating around.
Or you can wait a week or so for me to get my 35mm pre-ASPH Summilux back from Sherry Krauter, and buy some classic Leica glass for half that price