I am not an expert, but I think $4500 for the engine is a little (maybe a lot) high!
I was thinking the same thing Stacey. Worn out engine that has sat for years ?? Buying a "pig n a poke" for sure. I've seen engines with 1200hrs go for that amount.
As a comparison, I have a friend that owns a 250 Comanche. Engine has 250 hours on it, CS prop was rebuilt but never installed (still in the wrapping back from the shop). The plane has been sitting in a hangar for 10 years. It isn't in bad shape, but one can by a flying Comanche for the amount of money needed to get it in shape. The owner told me the plane might be worth $5k. So there ya go. Personally, my A&P told me to stay away from that plan and no one I talked to is interested so... there ya go.
