I second everything parent said ^ You'll get a lot more utility and value out of software these days, but if you really want a hardware synth, the non-trendy 9

I second everything parent said ^ You'll get a lot more utility and value out of software these days, but if you really want a hardware synth, the non-trendy 90s romplers can carry you far. If you want something with knobs and analogue circuitry look out for some of Behringer's recent offerings on the used market. TD-3 is a reliable clone of the absolutely classic TB-303 and can be scored for under $100.