I don't know why you want to do this. If the site bring you $ 50 a week, it doesn't make sense to sell it for $ 400

I think you need to post a proof that your site brings 50$/Week that you find a buyer

I'm very sure of what I'm saying this website can give you $50 a week though I can't give you proof because it was monetized with google Adsense but now my Adsense account has some issues so let's judge from the look of the website.
So with this issue with AdSense, how much you can earn per week without AdSense profit?
Your website design does not worth $400. just the usual template that can be purchased for less than $50.
Next, your website is 34 days old, so you based your profit range just after four weeks?
Whois Record for CoinEarns.xyz
How does this work?
Domain Profile
Registrant Org Private by Design, LLC
Dates 34 days old
Created on 2020-11-25
Expires on 2021-11-25
Updated on 2020-12-01
I agree with @-doubleU- you should need to post here some proof of earnings to be considered as a serious seller.