in that case we should siallow certain enchant books as well, the prices of a silk touch book are too high >.< and anyways, if someone were to beat jack and get his head, than it would definetly worth 10 k, no doubt, and if someone were to do so, he deserves that, don't you think so? lt could be a nice addition for pvp clans, and a new job for people.... bounty hunters! a price on a certain player's head! this is not a bad thing, it spices up the fun.
So if this goes through, than bounty hunters could be avaible as a job at the server XD of course at first people will do "forbidden head trades" maybe later we could add some plugin that records the pvp count and number of deaths in pvp and such, and will create some sort of bounty-value, which will lower the value of the bounty if someone is killed many times in one day (which indicates perhaps a sold out game, force farming) and raises if kills a varity of opponents(if the same person is killing the same guy over and over, it indicates about a force farm, duh), that could be awesome <3 and also will give pp clans a certain parameter for people to join their ranks XD
player heads can have much uses, such as what I've written above and in me last replies xD