The Sailrite LSZ-1 has a similar compound walking foot to what you show. You can see it in action at 1:10 into this video:
My only piece of sewing machine advice is to buy a real Sailrite and not one of the similar machines like a Barracuda. I bought a Barracuda, but by the time you fix all of the deficiencies that the Sailrite has improved on you will have spent as much as what a Sailrite costs.
I bought the Barracuda for $500 on Amazon. Added the monster wheel (still not as good as Sailrite's wheel) for $100, Sailrite case for $125, and the Sailrite user manual for $20.
To really fix my machine to have the locking wheel that Sailrite has would cost another $60 in parts. That is about $800, the same price as the Sailrite and I don't get the benefits of Sailrite service or the small internal improvements that they've made.
Since I've bought it the Barracuda price has gone up $100.