4 letter .com is tricky to appraise. There are meny LLLL.coms left out there so most non-pronouncable, non-premium letter ones are worth reg fee.
some people on this forum believe that the LLLL market is going to pick up this year, and I have to say that after seeing a few obscure LLLL names advertised I may agree. So the quick answer to your question is uxaj.com is worth the reg fee assuming no acronyms or meanings. If you hold on for a couple years than you may find that it increases in value. Bottom line is that you have a post dated lottory ticket in your hand - most likey worth nothing but could be worht something down the line, especially if you could find an organization that used that acronym. Best of luck.
I have a coulpe LLLL names including:
JFTO.com
i dont know why I like JFTO but its nice to say. Sounds like a talk radio station or something. could maybe be jewish federation of toronto ontario... lol thats a stretch
there is a nice thing about some 4 letter .coms (even some that are available). They are relatively easy to remember, especailly if there is an acronym you could use with it. Personally I will buy a couple more this year to add to my portfolio because i expect their value to raise somewhat over the next 2 to 4 years.
Good luck