I think the overall economy will dictate how the domain market moves. If it starts to improve, as I expect, after the summer, then the domain market will soon recover. If it starts to dig a deeper hole then all bets are off. But Saudi is saying that they are going to pump more oil, I take that as a sign that the worst is past us.
A curious fact that I have been chewing on is that poor LLL.coms are running about half the price of all-premium or better LLL.coms. Despite the fact that the percentage of LLLL domains containing one or more non-premium letters is higher, this would point to a major narrowing of the gap between the poorest LLLL.coms and the better ones, as the market progresses. Renewal fees have to be included in that calculation, but if I was buying now I would be looking at the low end. (I have plenty LLLL, need to diversify)
As for the 4200 LLLL lot on eBay - it all depends on how you look at it. Would you be better off spending a lot of time hand selecting domains (assuming you have the knowledge to do so)? Sure.
But for an investor who wants exposure to the LLLL.com market and has little time and/or knowledge, it could be a very good move. Say they sell for $20 each = $84,000. Then say that the buyer holds them for four years = $128,000 Total cost == $212,000. If a few sell to end users (they are not as bad as people are saying, I saw some triple premiums), so much the better, and there will be a trickle of traffic. Call it $200,000. If you sold them for $100 -- in four years then you would double your money - better than the stock market, most likely, and a lot better than bonds or most other investments. And I expect the minimum to be a whole lot higher than $100 in four years.