My last water pump to be installed

[texomawaves]

then I'm selling her. So I'm going to replace the pump with a $150 cheap-ass after market unit from Oreillys auto parts. My question is (and I hate asking this) can I replace the fluid with regular Prestone or do I have to use the high dollar Porsche coolant? I hope to capture and re-use the coolant I drain out... unless it's rusty or looks contaminated. Normally I would never cut costs, but I'm planning to upgrade to a newer low mileage Boxster, and selling my older high mileage one.