This is the 749th most frequent Japanese word.
買える
"買える" means "can buy" or "able to buy."
買える is used here in its potential form to indicate the ability to purchase fresh vegetables at the store.
この店で新鮮な野菜が買えます。
You can buy fresh vegetables at this store.
買える expresses potential purchase ability that will come into effect in the future.
明日になれば新モデルのスマートフォンが買えるようになります。
Starting tomorrow, you will be able to buy the new smartphone model.
買える highlights the opportunity or availability to make a purchase under certain conditions.