Hi I have got 2 spawners to sell: zombie and spider. Please note: These are not within 32 blocks (the distance is more like 40 blocks) of each other and so can not be built into a grinder together but can be separately. The chests and mossy cobble is completely intact, all I have done is light it up and connect the two spawners with a tunnel. These are really well hidden. They are deep underground and under an ocean so no one is likely to stumble upon these. I found them when I was diamond mining I am asking for 15k rupees for the location of these 2 spawners. Disclaimer: http://empireminecraft.com/threads/guide-selling-mob-spawner-locations.9738/
Yes you can make this into a grinder. because for each spawner it has to be 16 blocks so if they are only 20 you could because max is 32
I dont think I explained it well. What I mean is they both dont work at the same time. They are probably 40 blocks away then. I'll edit. Thanks for pointing it out