Nice. The seats just need a $100 kit from Leatherique and a bit of elbow grease.
I'd say start at 4k and someone who wants it cheap (lol) will say 2,700. Split the difference and sell the car for around 3,400.
A lot of guys will piss and moan about the bumpers. Tell them they can go buy some crappy plastic bumpers someplace and slap them on.
I'd say a fair price would be the middle 3k range. And not below 3k.
A 325e manual is a reliable car, and economical on gas. Good luck with the sale.
Performance one step at a time.