death cowl is gg but probably hard to find anyone that wants it. Most java zons would much rather have a griffons and usually only people who haven't played since pre 1.09 play bow zons.
cruel mask definitely has value as a few popular druid builds basically don't work without 20 fcr on the helm but it's not really spectacular so I dunno how easy it would trade or how much you could expect to get from it.
The rest seem fairly worthless.
edit: just realized cruel mask is frw rather than fcr