Get yourself Korg Microstation 61 (goes used for around $180-300 in US)
https://www.ebay.com/sch/i.html?&_nkw=Korg++Microstation&_sacat=0
or Korg Microarranger ($350-600)
https://www.ebay.com/sch/i.html?_sacat=0&_nkw=korg+microarranger&_frs=1
They are both big fun, compact and useful if you want just some fast music, no soft syths, no fuss.
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