They are solid engines and are as good as the prior owner maintained it. I'd check the powerhead compression and the gear oil in the lower unit before purchasing. A successful test run will help you in your decision.
Me also had a 88 SPL 1989 Evinrude outboard that ran great and I took very care of this motor and boat but it sold this past Saturday and I hated to see it leave the driveway.Take care of it and she will run great. I loved mine but I bought a Pontoon Boat instead since my family is getting bigger.