Need your advice on the structure of database tables and relationships

Hi, Can anyone suggest if the table and relationship structure in my database is correct in the following situation: I am implementing a website with multiple stores, which basically have the same product in stock. Since the items in different stores are the same, but the price and quantity in stock in the stores are different, I did the following:

1. I created a table of products with name, description, picture.
2. I created a store table with store information
3. I created an intermediate table shop_stock with shop_id and product_id columns and Price and quantity columns which are related to the store.

To get the price and quantity for a particular product from a particular store, I did the following:

Shop::with(['products' => function (Builder $query) use ($product_id) {
            $query->where('id', $product_id);
        }])->findOrFail($shop_id);

class Product extends Model
{
protected $fillable = [
'name',
'description',
];

}
class Shop extends Model
{
protected $fillable = [
'user_id',
'name',
];

public function products()
{
return $this->belongsToMany(Product::class, 'shop_stock')->withPivot('price', 'balance');
}

}