Hi Nps,
I just went thought whole thread and I have found only 5 domains I would love to have, and I am sure they were not regged for $10. As many said here for new domainers (which I am) having 1 word .com seems like a holy grail, but in my experience those reg fee ones are for registration for a reason. I have also registered couple during my early learning stage but the interest for such domains is rather low from what have seen. So unless the word is highly brandable I am staying away. There are definitely better domains to register for your coupons. On the other side if you can get hand on something short and meaningful, single words are highly liquid and stable form of investment IMHO.
So to add to the list this is my collection of single words and names in .com (most of them from my early stage)
focusses
cherlene
cucked
impeccant
imperfectness
jaziel
matrina
neurophysician
pauldron
rechase
slivovic
weathery
yellowly
vocaboli (words in Italian)