Should I consider user-suggested pricing?

Hi there,

I've created a Wordpress plugin, WP Meteor, which postpones loading scripts until first user interaction or 1 second, whichever happens first, giving 2x-5x performance metrics boost. Yes, it doesn't work for everyone for obvious reasons, but there is a pretty large cohort of people who has no side effects and was . But then I was personally banned at Wordpress after arguing with them, so was the plugin. So I decided to sell it. Distribution outside of Wordpress ecosystem costs money. After the ban, 3 people (web developers) instantly reached out to me ready to buy it, and now the question is, what should be the price?

The best match I've found is WP Rocket, which costs $49/year/site, $99/year/3 sites and $299/unlimited. Yes, my plugin is 100 times simpler but gives 2x+ boost ON TOP of WP Rocket. From these people, I've got the following opinions

But here is a suggestion from one of the potential customers:

A multi license approach for 1 site , 5 sites , Unlimited would be nice. Pricing you can start with say 19 , 49 , 149

Any ideas?