I am selling the coordinates Of a cave spider spawner I will accept bids 4k or higher. This offer will last for 1 week after it is posted bedore It is no longer for sale! So be quick.
Mob spawners are useless unless they are under a town with mob spawning. Even then it would belong to the owner of the town. Since you are a resident i assume its in the wild or in another's town. You will have a difficult time selling this to anyone who has been on the server for a while. If you sell it to unfortunate builder then i guess its their loss. In anycase i think its important that people are made aware of stuff before they throw away money and are taken advantage of.