I have one that looks like BILTIT's eco-worthy (from ebay) but it has much larger teeth than the one in your pic. Even after quartering the apples it grinds them into quite large pieces 1/4-1/2 inch (around 1cm) so the juice yield when pressing isn't all that great... only 40%-50%. I resorted to putting the resulting pulp in a bucket then smashing it with a pickaxe handle, the "old fashioned way" in order to get more juice.
With the finer teeth yours looks ideal for apples. Jolicoeur suggests that the pulp should be 3mm or about 1/8 inch, and based on my experience I agree with him. Certainly worth a try at $75.
I plan to make a motorised model for next year, more or less based on Jolicoeur's design, probably rotating at around 5-10 RPM so if anyone has comments about this speed I would be pleased to hear them. Might be useful for you if you decide to motorise.