Choosing domain for Webmaster Marketplace

I have been developing a system which aggregates both domain name and developed sites sales thread from multiple webmaster forums, and collects stats and stuff on what is being sold. It has mostly been just a side project and for personal use, but I plan to launch it as a full on website now, as a central place to buy and sell sites/domains with many way to search and display results.

I am trying to decide on a good domain for this. I would like to keep it more general and not specifically related to either websites or domains, and also keep it open for anything webmater related in the future.

So far the options I have come up with that were available and I already registered are:

webmastermp.com
forsalebywebmaster.com
fsbwebmaster.com (shorter but maybe less obvious version of above)

What are you opinions on these domains?
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M engine

I think #1 is a little too close by bizmp.

IS fsbw.com available? (probably not...) because I do like the forsalebywebmaster idea.