1990 300SE (W126) For Sale: Bad Water Pump

[NTL1991]

Hello, I am currently looking at a 1990 300SE with a bad water pump that has 103,000 miles on it. The gray interior is absolutely pristine (!!!! Can't stress this enough !!!) and the exterior is light blue with no rust anywhere. The only exterior flaw is the passenger's side top of hood near the windshield where it is bent up slightly. The price is $2000. Is it worth it to get the water pump and have it installed. Would it be cheaper if I bought the water pump myself and had a shop install it?

Thanks,
Nick