Yes, for most shops it is. I'd expect it to be £30 for a 3/4" fish in your average shop.
They do get large, about 45cm/18", and produce a lot of waste. But I think they are a very attractive fish and interesting fish. I currently have a 40cm/16" fish (the one in my avatar) and another group of 11 L190 and L027. If you didn't already know, they need to have access to a large amount of bog wood within the aquarium. Their diet should consist of the wood/algae in the aquarium, a variety of fresh vegetables and algae/plant based dried foods. Don't meaty foods often though.
i will. well i was ment to of had it yesterday, but the courier had some issues, at least ill get a full refund, or another royal sent out to me if he/she dies