public function term_relationship_deleted( $object_id, $tt_ids, $taxonomy ) {
		// Does $object_id belong to a vehicle?
		if ( INVP::POST_TYPE !== get_post_type( $object_id ) ) {
			// No.
			return;
		}

		// Is the taxonomy one that overlaps a meta field?
		$keys_and_taxonomies = self::overlapping_meta_keys();
		if ( ! in_array( $taxonomy, array_values( $keys_and_taxonomies ), true ) ) {
			// No.
			return;
		}

		$taxonomies_and_keys = self::overlapping_meta_keys_flipped();
		// delete post meta values from this post.
		foreach ( $tt_ids as $term_taxonomy_id ) {
			$term = get_term_by( 'term_taxonomy_id', $term_taxonomy_id, $taxonomy );
			if ( is_wp_error( $term ) ) {
				continue;
			}

			if ( 'availability' !== strtolower( $taxonomy ) ) {
				$this->hooks_remove_meta();
				delete_post_meta( $object_id, apply_filters( 'invp_prefix_meta_key', $taxonomies_and_keys[ $taxonomy ] ), $term->name );
				$this->hooks_add_meta();

				do_action( 'invp_taxonomy_overlapper_deleted_meta', $object_id, $taxonomy, $term );
				continue;
			}

			// The availability taxonomy can contain more than one term, so don't just blindly delete.
			if ( empty( $term->slug ) ) {
				continue;
			}

			if ( 'wholesale' === strtolower( $term->slug ) ) {
				$this->hooks_remove_meta();
				delete_post_meta( $object_id, apply_filters( 'invp_prefix_meta_key', 'wholesale' ), $term->name );
				$this->hooks_add_meta();

				do_action( 'invp_taxonomy_overlapper_deleted_meta', $object_id, $taxonomy, $term );
				continue;
			}

			// $term->slug must be for-sale or sold
			$this->hooks_remove_meta();
			delete_post_meta( $object_id, apply_filters( 'invp_prefix_meta_key', 'availability' ), $term->name );
			$this->hooks_add_meta();

			do_action( 'invp_taxonomy_overlapper_deleted_meta', $object_id, $taxonomy, $term );
		}
	}