Well, everything started almost 2 years ago as a test site. After a while it became a serious thing. Problem is that now switching to another domain will mess up all the seo score gained till now.
Yes, I know. I did a stupid thing, but really, I had no plan to do something serious. To tell you the whole story, it's not even a matter of price, in fact I registered that domain as premium, and (laught) it actually costs a bit more than maintaining a com domain. lol.
While typing to write this message (and before pressing the post button!) I registered the same domain as org just in case somebody reading this post would think to secure it hoping to make an easy gain. I have another project on a net domain, running since 1999. The dot com was already taken. I offered $1,000 to buy the dot com. Offer refused, and I was asked for $15,000. My answer? Go fuck yourself. Do you know how the story ended up? Nothing really changed for me as my site is still running smoothly and that idiot who still own the dot com lost my $1,000 + $170 more for maintaining that domain in all those years.
For the garden, unfortunately the dot com is already taken and I think trying to buy it will result in a similar same story. I know the tk domain looks a bit unprofessional but I really need to evaluate how switching to another domain can impact on the site. I can map the old urls to redirect to the same pages on the new domain, but I think google won't take that very good. I'm not sure if may have sense moving from an exotic domain to another exotic domain. Also consider the site is a community, not a corporate site, but I will think about it. For sure, I can't change the name of the site after two years.
Thank you anyway for the suggestion. It is appreciated.
Yes and since your site has became a serious thing. Then, changing to domain. Com shouldn't be a problem and switching to another domain will mess up all your seo score gained cos all you have to do is something like re-direct which will direct people when they go on domain.tk to your new domain.
i think your users are happy for this ;-) 
