Hey guys. Is this a good price?(1) and (2) Is it worth the time and effort to replace them if I don't have any issues currently? http://cgi.ebay.com/ebaymotors/92-94-Audi-V8-Quattro-ABH-Eng-BOSCH- Fuel-Injector- SETx8_W0QQcmdZViewItemQQcategoryZ33554QQihZ005QQitemZ150111952080QQrdZ1 Lanier '92 V8Q '91 V8Q