If you are in the right age range (or maybe even if not) you will appreciate this… I have considered buying one several times and he has options for if you want it assembled or to buy it as a kit with various levels of included components depending on what you already have available to you so even at the max cost it’s not ridiculous priced and can be rather cheap if you have parts and do things yourself. Anyways, it looks incredibly fun and he wrote a whole UI custom for it, so it’s not a SWAG product:
OPL Studio from Cheerful Electronic on Tindie
OPL Studio - OPL2 / OPL3 MIDI Interface | Hackaday.io
It looks like he just sold out but they’re back in stock pretty frequently so if you like it you could get on the list or email him about when he expects to have more.
you will see it, in it’s intended housing on the pages linked, it’s not just the circuit board and screen.