You have a good point; I was wrong! The term "animech" is indeed used more than "animecha".
I stand corrected.
Still, to whom are you trying to sell this domain? You must understand that combining the term "animech" (which is fairly uncommon, according to Google) and "xtreme" (an intentional misspelling of a proper English word) isn't going to produce a name popular with domain resellers (it's neither generic, short, nor rare), so I'm going to assume you are targeting only end-users.
Clearly, you don't expect any end-user have an existing product/brand called "animechxtreme", so you must be targeting individuals trying to
create some sort of online brand (like a forum).
In that case, what would ever lead anyone to pay more than regfee for this name? The .net/.org are available, the .com.net/.org for "animechextreme" is available, and pretty much every other "animech[word].com is available. Why would a creative individual trying to create an online brand pay above regfee to use
your name (one that is neither generic, short, nor rare) when he/she could pay regfee and use one of their own choosing?
I'm not trying to be harsh;
every domain I own is worth regfee, apparently. :D