How much is my Facebook page worth

Hello so someone recently offered to buy my Facebook page off me.

It currently has 50,000 likes but I only start the page 3 days ago and it's already got 50k and it gets at least 5k likes a day.. Here are the insights

Total Reach: 4,809,000
Post Reach: 4,730,000
Post Reach: 770,000

The average content gets 5-10k likes but could get more of the page is boosted.

Thanks

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