i have just seen a listing that states she bought the aquarium from pets at home and it cost £30, i work there and they cost £14.99 brand new-doesnt come with net but you can buy one for between £1-£3.
dont be fooled by sellers stating they paid more than rrp.
also if a filter hasnt been cared for properly and maintained it wont work properly and YOUR fish wont be healthy-i dont advise buying second hand tanks because it could have had disease.
the best thing with fish is to start from scratch with brand new equipment.
FISH MUST HAVE FILTERS TO LIVE HAPPILLY AND HEALTHY OTHERWISE THEY ARE SWIMMING IN THEIR OWN WASTE WHICH BECOMES TOXIC TO YOUR FISH.
ALSO AT PETS AT HOME WE HAVE A POLICY NO FILTER= NO FISH