In almost 100% of cases, if the domain you want has gone, much better to forget it, browse the dictionary, and buy another.
My method is get some mates to brainstorm after a few(!) drinks, then prune the list and prioritize once sober, and then try 'em all until I get one that suits*.
Ebay often has a total and utter bargain for $20.00 - I get a 'one numeral plus three letter domain' that makes sense, for under $20, about a year ago. And ebay, if nothing else, can give you ideas of what might work.
*Never, ever buy a domain unless totally sober - but you knew that ;)