My choices:

* BassStation 2 (I love mine like I've never loved a synth, it's a great sounding and inspirational synth to play for just about anything. And it's soooo cheap)
* used Microkorg (it's like £100, come on)
* used Miniak (it's like £150, come on)
* any of the old 80s knobless analogs (dw, alpha juno, jx etc)
* couple of newer romplers like the Korg Kross, Juno Di/DS (though build quality suffers)
* previous generation workstations (Tritons, Motifs, Fantoms)
* any of the old JV series (my jv880 was 80 quid...), the 1080 is only about £120 usually
* older VAs like an1x, jp8000 (my sh-201 was £150...)

Etc etc