I used something called items for sale on facebook and picked up a complete fluval roma 240 setup with stand arond 6 months old the heater hadnt even been taken out the box and there are bottles of dechlorinator and bacteria start unopend all for £120. They retail around £350 there was also a 2ft resin copter but i swapped that for a betta tank. I think its best to set ya self a limit how much u want to pay then just keep looking around on f.book, ebay ect