This grower is fairly sure of this plant identification.
I usually have many avocado plants of various sizes, from sprouting seeds to matured, so get in contact to arrange a swap.
Avocado pear, Aquacate, Alligator pear
Persea americana (Avocado pear). This species produces glossy dark green leathery leaves. Flowers are small and greenish.
They will need a rich soil with sharply drained soil and full sun, they will need shelter from strong winds.