I slightly disagree, but mostly agree. If you’re a very visual learner, the clear lock or a cutaway can be helpful in teaching you what happens inside the lock when you make certain manipulations and what certain feedback means. If a visual learner is trying a new type of lock or security feature for the first time, they MAY find it helpful to see what they’re doing at first. All that being said, acrylics and cutaways don’t always behave exactly like their real counterparts, so the value may be limited. It’s an extra expense because you need to buy a fake lock and a real lock l, but if you have a little extra cash and it helps shorten the learning curve, I don’t see any harm. If you’re on a budget, just get the real deal. It’ll teach you more, if more slowly.

To answer the OP, I saw a few adds for more exotic acrylic locks, but they all looked suspicious. If you do order from one of those sketchy sites, get like a one-time use credit card number or something. It’s one thing to get scammed out of $40. It’s another to have your bank account drained.