For those who sold an online business, which websites/services did you use?

I've already explored and successfully sold on Microns.io and Acquire.com, but I'm curious about other options and experiences (posting in multiple communities for more information/insight not to be spammy haha).

So for those who have sold an online business before:
1. Which websites or services did you use to list and sell your business?
2. How was your overall experience with these platforms?
3. Were there any unexpected challenges or benefits you encountered?
4. How did the valuation process work?

I'm particularly interested in hearing about platforms other than Microns.io and Acquire.com, as I'm already familiar with these. However, if you've had experiences with these platforms, I'd still love to hear your thoughts.

Thanks in advance for sharing your experiences!