Weasel Seller - File Memorandum?

[Marc Celestin]

I have a property under contract, since November and I've been hit with multiple excuses and kicking the ball down the road. It's but so many times you can use Covid as an excuse. The buyer I believe is trying to wait me out to cancel the contract, especially since the market is appreciating.  I'm thinking I should file a memorandum to purchase at the courthouse, in the event, he attempts to circumvent me.  In addition, he has a hard money lender, so I'm not sure how that will even affect the court filing.  Any suggestions or advice?