I started off my coffee adventures with a Bialetti Moka pot and one thing I found out is that Bialetti make a model called a "Brika" which is about 50 bucks. Believe it or not, this is a stove-top with a crema-enhancing device!!!
I know Conga Foods in Melbourne stock them.
Never tried it but if you go to the Bialetti website, youll see a description.
Half decent espresso machines are not cheap and I still use a humble Sunbeam. Most Sunbeams are of the much-despised thermoblock type (including mine), but they do make a boiler model called "Cafe Ristretto" and the RRP is $109. You would probably get one at a bulk electric store for a bit less than that.
You might prefer to save your 100 bucks towards something more substantial and in the end, that might be the best course of action.