Is the E36 320i worth it?

Good day fanatics, I'm in the market for an E36, preferably a 318is or a 323i. I have come across a 320i at a good price with mileage in the 290000km region and was wondering if it would be worth buying?

Also, is the fuel consumption good for the 320i vs 318is (6cylinder vs 4 cylinder weight and power)?