Teenage Engineering is a frustrating company. On the one hand, they set out to create some of the most fun music equipment you can own: their Pocket Operator line is awesome for beginners of the hardware world, and they've consistently innovated with their grooveboxes. The problem? They have absolutely no respect for their pricing model. The OP-1 used to cost $800, which was already a big ask for a microprocessor, OLED screen and plastic enclosure. A great machine, but a hard to swallow price to be sure. Once YouTubers started picking up on them, they chose to increase the price (blaming it on a supply shortage, since we all know how hard it is to find ARM cores and OLEDs /s), leaving the OP-1 at a bewildering $1100 total.
If you, the reader, has $1100, pick up an Octatrack. Elektron is one of the few companies that pushes the envelope of digital sequencing and hardware production, and the Octatrack is the pinnacle of their work. At $900-1000, you'll definitely get more mileage out of it than an OP-1, and you don't have to support Teenage Engineering's shitty pricing schema. Even at $600, you can buy an Elektron Digitakt/Digitone, which will probably serve you better in the long run.