Just walked past Mr Toys Runaway Bay and they had 2 pallet loads of Furby Boom Crystal for $29.99 each, several different colours available.
Also available online, though obviously with some delivery cost on top then.
Says normal price $99 but usually $60-80 in the shops when I have seen them.
Boom boom https://www.youtube.com/watch?v=rtxbM7-jAD0