2003 Essex Monarch 23’ with a 496MAG HO and mercruiser bravo outdrive. Just got an invoice from a shop that charged $660 for an impeller & housing kit. Parts only. + $300 for 3 hrs labor install. I’ve owned a few boats and have done a few impellers myself, granted, not on this boat. But this seems way off? Thoughts? (Also they never called to upsell a stainless housing or anything). I have yet to pick the boat up or pay.... I can’t find a basic kit for over $100....