Trust is a good keyword, but my first reaction is that the "Z" kills the whole idea of being "trusty".... makes it seem shady and scammy... I normally like these type of domains where you replace a single letter of a word to make a brand name, but I'm not so sure on this one. I'd expect regfee to low $xx for reseller and mid $xx to low$xxx for enduser, assuming you could find one. That being said, if you do actually find someone that likes it, you might be able to get more... but demand will be low for this - I personally wouldn't invest regfee in it and I do a lot of brandables.
Hope this helps!