I'm sorry for the crappy audio (I have no sound card, so I had to use a microphone hanging over the speakers.
short story of how i found the synth:
We were going out to look for garage sales, and we found one. This sale had a few uninteresting things (to me), but one find caught my eye; it was a keyboard the length of my desk. I asked if I could have it, and considering the price was surprisingly low (most CTK-601s cost $100 or more, this one cost less than $50), we bought it. This was also the day we found a rocking gaming chair and a TV at the same garage sale. Anyways, I tested it, and to our surprise, it fully functions! It also had no presets made by the original owner (but this could be because the synth erases it's data if it isn't plugged in for a while). It helped me learn the name of all the keys, and now, I made this song with this.

You can use this for free, especially if you remake it so it doesn't sound crappy.