Congradulation!!! Under $4K is a great deal. Mine is a 1991 with 102000 mile and it has exactly the same color as yours and I paid $5K for it this May.

Hopwever, I have been working on it ever since the first day and $1200 spent so far. Changing all the filters and fluid will run you about $300 DIY. Hope you will have better luck than me.