I need to replace the ball joints on my '98 Ford E-250. NAPA, Autozone, and O'Reilly each offer a low priced option, $13-16 each, and a higher priced option for a little more than double that amount. The low-priced ones can be had with grease fittings. Since I don't intend to keep this beat-up old van forever, can I get by with the cheaper ones?