The one below is $495, and to my untrained eye this looks more solid than Precious's DIY machines.
https://www.alibaba.com/product-detail/Plastic-Crusher-Equip...
https://www.alibaba.com/product-detail/Plastic-Crusher-Equip...
I see this same “pc180” elsewhere for about $1500, so i’d guess that’s what it’d cost when you actually try to buy it.
Maybe I’m wrong, maybe that only applies to the couple machines I have looked into and not this one.
edit: If you don't want to build a machine, you can find vendors through the PP Bazar[1]. Even fancy ones with CE and made from wood somewhere in Austria :D [2]