Lately 4 letter .com’s have become the rage.  No matter how bad the letters if its a four letter .com - its gonna be $20+.  I believe in 4 letter .com’s too - I have a bunch of them.  But there’s a lot of junk being bought today - combinations of j, k, u, w, x, y and z - that will never bring significant parking revenue and are unlikely to be purchased by an end-user. 

My opinion is that domain name buyers would be better off picking up a high quality 4 letter .net than a low quality .com.  An example of one that I picked up recently is yoff.net.   Absolutely pronouncable and brandable.  Sky high value as a .com - very affordable as a .net.