Actually the story is longer and more interesting than I made it, because the domain was "sold" two times, but first time... I had it back!
First time I "sold" it, it was an american company that wanted to acquire the domain for a startup.
They sent me a direct email, as they found it in the whois info.
My price for them was EUR 15000 but (essentially as it was a startup) they asked me if they could just pay the half, 7500 EUR, and if after two years the project would have failed being funded and / or generating revenue, I would have the domain back.
This was regulated by a signed contract.
After two years, they failed to reach their objective, so I managed to have the domain back, and essentially gained 7500 EUR for free. This was - I think - in 2010.
One year ago, when I was out of the domains business, another startup (mexican) asked me to acquire the domain. I raised the price to EUR 25000 also because since 2006 I had been using the email for my personal account, and losing it would have been a complication.
After a couple of months they confirmed they were interested in buying the domain and accepted a condition to keep my email account up and running. Luckily the buyer was a very honest and cool person, and one year after the sale I am still using my @luv.it email on a daily basis.
In the end, from LUV.IT I gained EUR 32.500 - and I was directly contacted by the buyers "both times" I sold it.
Now I have no idea if I was using a professional brokerage service that could have reached even higher figures, but I guess I am happy with what I got