The dat live aquaria has pictured is an indo dat same as this. But the scientific name given is for a thin bar datnoid.
As far as price $60 for that size is over priced. I was able to pic up 4" pellet trained indos for under $25 by shopping around. Regularly priced from $35-50, though prices can vary greatly by location.
Being in south florida, not sure of what a reasonable price is. If this is the only one, he might have me stuck...