I think it’s expensive for what it is.
The prices for decent W201s have really climbed in recent years but there’s a lot of average stuff that I think is being priced above it’s weight. It’s a low spec 2.6 with an aftermarket bodykit, not a rarity. I’ve not seen the car in the flesh but have seen photos showing various small dents/chips etc, rust around the arches, budget tyres - not a £10k car IMHO.
It also just looks like it’s been shined up with silicone spray and painted recently - boot badges in the wrong place, looks like masking lines around the OSR light and where the rear panel meets the back quarter - could be my eyes there but definitely not on the other points.
The standard and optional spec varied a bit over the years, but I found this from the UK price lists which I saved ages back and would have been from somewhere around 1990 approx:
View attachment 95770
In the early days, as said, everything was an option. It’s what made MBs interesting - very few early W201s were the same, all built to order. I’ve seen base model cars with stuff like orthopaedic seats and self levelling rear suspension, air con, electric memory seats and airbags on mid-early 80s models etc. You could spec them how you liked. And when you found a really high spec car it was usually a very special car. I think it was probably possible to spec a 201 up to almost entry level S-class territory, certainly well into 124 prices.
Simon - dependant on your budget and intended use, I’d hold out for either a nice 16v or a 2.6 sportline, and not worry too much about the mileage - focus on condition, originality and history IMO. The 16v is the driver’s choice, a 2.6 is a relaxing cruiser with a creamy smooth straight six and mates well to the autobox.