There's a few issues that I can see. For starters, it is true that brake problems are common on these cars (as with most early ABS system cars), but the problem does not stem from a simple relay. Best case scenario, it needs a new accumulator. Worst case, the entire unit/assembly needs to be rebuilt. And since this is a very early hydraulic (not vacuum) driven ABS system, remedying either problem is going to be very expensive IF you can even find the parts needed. As Imp558 mentioned, the cheapest solution is to convert to a non-ABS brake system, but that involves finding/buying parts from a non-ABS car and doing custom work, not to mention you're taking away from the car's original equipment.
You also said the interior is mint. Mint means flawless/like brand new, but while most of it looks nice, I can see that the leather on the outside bolsters of both front seats has worn. While this is very common on these from getting in/out of the car, it seems more excessive than even my old TGP which had well over 100k miles on it. The outer left side bottom cushion of the driver's seat also appears to be a bit squashed. BTW, what are the wires coming out of the back of the radio?
Lastly, on the exterior, the hard to find (especially in good condition), thus expensive front lower valance is missing. The power antenna also appears not to be working. And maybe it's just the way the reflections make it look, but the driver side fender looks like it's been bent in from making contact with the door when it opens.
All in all, from what can be seen in the provided pictures, it looks to be in decent overall condition, but there are definitely some issues I would not expect to find on a car with very low miles for the year. I'm not trying to bash the car or you at all. Just pointing out that some of these things are rather expensive and hard to find items, so they definitely make an impact on the value of the car and hinder the ease with which you can sell it.