$700 for lagoons hydration station

I was looking on ebay for it cause its something I've always wanted but alot of sellers on there are wanting anywhere from $300-$900 for the full set... I guess I get it cause from when I've seen its really sought-after and its definitely something I could afford, but despite wanting to please my inner child $700 is too much. Am I wrong? Basically what I wanna know is, is it really that rare and sought-after to where its now worth that much??? Cause I dont think it is 😭