Just bumping to see if anyone does invest in domain names. I have heaps because they relate to my online businesses, but also have about a dozen high quality domains I'm holding.
A few popped up yesterday which I thought were very interesting. All the capital cities in .net.au format. Sydney.net.au, Melbourne.net.au, Perth.net.au, Goldcoast.net.au etc. The top 2 (of course) were Sydney and Melbourne which went for about $8k each - Personally think those would be a very good buy. Turn it into a directory site and you would make that money back with adsense. Still they are .net.au but I don't think that matters for these keywords. Massive difference though between that and the .com.au of our capital cities. Same company recently put up a sale of the following for a price of $1mil+ sydney.com.au, melbourne.com.au, brisbane.com.au, adelaide.com.au and auction.com.au.
Also late last year I was gobsmacked to see nike.com.au was up for auction. Can't believe Nike somehow forgot to renew the domain. It ending up selling for about $3k back to Nike. But in this instance, if someone did manage to register it you can guarantee Nike would have taken them to court and won the rights to the domain.