Well .... if it is the water pump, these things tend to go about any time ... It could be related to just sitting for that long a time and its seals getting dry.
My opinion: Whether you keep it or sell it, ask the mech what the water pump replacement deal is? If they say $450, make them an offer. You just paid them good money for good work. I bet they'd work with you.
What you want is a "negotiated situation"- that is
-You just picked up your car and now the water pump is leaking
-It probably doesn't have anything to do with what they just did to the car
the car sat for 8 months getting all dried up
-You are disappointed that you now have to put MORE money into it
-You do want the car to continue to run properly, whether keeping or selling it
. You have another car that will need service
.ask them to help you out. "Make me a deal on the water pump
-No matter what they quote, counter with a reasonable offer.
You may be surprised.
My 2 cents .... Haasman
'03 E320 Wagon-Sold
'95 E320 Wagon-Went to Ex
'93 190E 2.6-Wrecked
'91 300E-Went to Ex
'65 911 Coupe (#302580)