1997 Buick Park Avenue Intake Manifold Leak

Hello, I got the car in march and about 35 days later I find out I need a new engine because of a intake manifold gasket leak. So I get the engine and it has 81,000 miles on it now just recently I took to a repair shop and ive now been told that my intake manifold gasket is bad yet again, and all the other gaskets are leaking oil! Ive been told it will cost between 2,300 to 2,500, is it worth fixing? And is this a good deal?