Laravel 5. Retrieve data from DB::select

Code:

        $best_price = DB::select('Some SQL statement');

        foreach($best_price as $best_price_id) {
            $best_price_id->id;
        };


        $product->best_price_id = $best_price_id;

        return $product->best_price_id;

Result:

The Response content must be a string or object implementing __toString(), "object" given.

Definately I am retrieving information from the DB incorrectly. Please suggest better option.

via Chebli Mohamed