Donations are appreciated, but not required. Feel free to try them out first and donate based on how useful they seem to you, or just download them for free. I’d rather people use them for free than not use them at all.
Samples from the fantastic (but often overlooked) Casio VA-10. This sample pack includes:
This pack is name your price via the donation link below. That said, donations aren’t required at all; or feel free to download and try it out to see if you like them before donating. Whatever works for you!