What is driving the price up, at least on Chinese premiums, is the speculation that enduser sales in China have no where to go but up, both in terms of frequency and price. If you buy 10 CP LLLL.com today for a total of $10,000, all it takes is one or maybe two good enduser sales to make your money back and possibly make a profit. I suspect that part of the speculation is that these domains have or will acquire a certain "cachet", not as collectors' items as some have speculated, but as prestigious business and commercial domains (the same way LLL.com have elsewhere), in which case the value would rise exponentially, and that $10,000 initial investment would see a very healthy ROI, while the remaining unsold (to endusers) CP LLLL.com in the speculator's portfolios will hold their value (liquid assets) and maybe even increase in value on the wholesale market.
It is all speculation and as such a gamble. Anyone buying CP LLLL.com today is looking at a possibly long term investment. It doesn't cost much to hold these domains ($8/year plus loss of ROI on other investments the initial purchase price could have been used for). I personally believe it is a good bet if you can afford to hold them 3 to 5 years.
I'm not arguing that you're wrong. I'm just saying that if there's a reason to be optimistic about the resale value of these domains, I'm unable to find it. I looked up the sales history of LLLL Chinese premiums, and only found 20 on the record that were over $10k. That's 20 out of 160,000 and most of them were NOT purchased as Chinese premiums, they just happened to be Chinese premiums in addition to something else. Here's the break down of sales over $10k:
kcms.com @ $10k = American gaming site
zmnm.com @ $10k = Hong Kong buyer, no site
pwrd.com @ $10k = Chinese buyer for a site called "perfect world"
cdlp.com @ $10k = Danish owner for unkown purpose.
xprs.com @ $10k = American owned, Logmein. ( express?)
glmx.com @ $11k = American owned, money market site
myyp.com @ $11.8k = American owned ( my yellow pages )
scpg.com @ $12.6k = British owned
csdn.com @ $14.5k = Chinese owned, no site
hyst.com @ $15k = Romanaian
ccms.com @ $17.4k = Unknown buyer
stpl.com @ $18k = Sahajanand Medical Technologies Pvt. Ltd. ( an Indian company with a site in English)
sgbl.com @ $18.75k = Lebanese company, site in French
cscm.com @ $20k = American company
sdfc.com @ $20k = Indian Company
wzrc.com @ $20k = Chinese company, site in Chinese
ngsn.com @ $20k = Soccer related site in English, unkown owner
cmdx.com @ $30k = American investment site
sylt.com @ $35k or $50k ( 2 sales records for this domain in the same month ) = German company
bdsm.com @ $295k = American sex site
That means that a maximum of 4 domains out of 160,000 were purchased as Chinese premiums at over $10k. It's possible that there are sales that haven't been recorded that change the picture, but when I look at what's actually on the record, I don't see anything to motivate me to run out and spend thousands on these domains.