albinism is expressed in wild animals rarely, yellow or white makes an easy target
the survival of the genetic trait depends on predators being present, in their natural environment, Australia, frogs have many different predators to contend with but in nz the numbers of predators is reduced dramatically.
a smal;l pond with a locked in population could eventually through inbreedng express sports or mutations in the population, and with frogs spawning so many eggs the numbers of coloured frogs might be large.
there are a large amount of ifs and mights in this eventuality
you could always blame it on genetic damage from sprays etc.
still too much money for a frog
wait a few years and the market will be flooded with people breeding them, prices will come down
albino to albino = albino, spawn 300 tadpoles all albino
3 or 4 people breeding them = possibly 1,200 albino frogs on the nz market per year = 20 to 40 dollars each