Thats why its very important to know how to preserve them properly.
This tutorial fromOBYMARTHAon Youtube is a perfect way to preserve your avocados.
Its fast and easy, and you dont need a long list of materials for this.

Image credits: OBYMARTHA via Youtube
Watch the tutorial below to learn.
Cut the avocados into uniform pieces and place them on a tray.
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Step 2
Freeze the tray with the avocados in the freezer.

After it got frozen, take out the tray and scrape the avocados off the tray using a scraper.
double-check to separate the avocados that got stuck to each other.
After this, put the avocados on a big ziplock.

Place it in the freezer and just take out portions whenever you need them.