mate.. patience pays.. take your time.. you are better off raising an aro from little cos you would know it like the back of your hand.. whereas if you are going to take a larger aro.. would you have a larger tank? appreciate that you are sad that it is in a 90G.. saving it is another thing.. even if the seller gives you a list of feed that the aro accepts.. it will take the aro some time to get used to new surroundings and might not eat for a week or more.. and then you'd be breaking off your head wondering what the hell happened.. my largest has that black (not black, but dark back), whereas the next largest doesn't.. i guess it varies with surroundings..tank backgrounds etc.. the aro has drop eye.. check the condition of the tank.. if it is clean and well filtered etc.. is the fish active.. post all this and you still decide to take it.. really large aros shouldn't cost a lot.. the larger ones most people want to sell cos they cant handle them anymore or house them adequately.. as an example.. i was offered a two footer for 65 quid.. i asked the aro for 12 pounds.. and the guy actually agreed to give it.. but i never picked it up.. finally how are you planning to move the fish.. well all the best.. cheers