The cheapest machine that makes very good espresso.

The Sage Bambino punches absurdly above its price. ThermoJet heating gets to brew temperature in 3 seconds. PID temperature control keeps extraction consistent. Low-pressure pre-infusion mimics what machines costing three times as much do. A proper manual steam wand — not a panarello — lets you learn latte art properly. And the 54mm portafilter with unpressurised baskets means you can actually dial in your shots. At 19cm wide, it fits kitchens where nothing else will. This is the machine that made the home espresso community reassess what's possible under £300.
The cheapest grinder that can keep up with the Bambino's capabilities. The ESP PRO variant's fine adjustment steps are essential for dialling in espresso.
You want real espresso on a tight budget and you don't mind pairing it with a hand grinder. This machine teaches proper technique without frustrating limitations. The only reason to spend more is if you want automatic milk frothing (get the Bambino Plus) or an integrated grinder (get the Barista Express Impress).