Which is better? shopify vs Ebay

Shopify Discussion
1

I am a digital marketer. Actually I have just started to learn and work as a DM specialist.

Which plate form os good?

Most of my friends are using Shopify and I want to go for Shopify as well.

I just want to know the pros and cons of both of them.

Is there any one who can help me to go through this?

Thank you so much.

2

I forgot to share my product. Here is my site which I want to convert into shopify store and sell my machines over there.

https://thetennisgeek.com/best-tennis-ball-machines/

If you could guide me throughly ?