Based on the growth of the one I had got it at 3/4" grew to about 3.5"... I would think it would take around a year to grow one to 8 inches. He ate like a mad man but just grew painfully slow. 100$ to me really isn't that much money and wouldn't think it would be to anyone in the working world. If you play a round of golf at a nice golf course there goes your 99$ that in turn could buy you a fish that will be with you for weeks, months , years.. If you want the fish buy it... No fish is really worth any amount it's whatever someone is willing to pay for it.. When I was really into cichlids before and looking for an umbee I would have bought it for that price.