if i can offer an impartial view, i have never owned a 145 (nearly did once
) but have always liked the styling of them. most people i know (non-alfa people) refer to them as 2bread vans2 so the stying isn't to the mainstream guys taste, like most alfas.
your car is probably worth near to what you want, but only to you. you will only find a new buyer from the alfa fraternity. the average guy on the strret who could be tempted towards alfa ownership would go for something like this
Buchanan Motor Co : 2000 W ALFA ROMEO 156 2.0 TS VELOCE FLAGSHIP BLOOD
a far more modern looking car (in the general publics eyes) rather than the quite dated looks of the 145.
i can see where the previous comment came from about £2k buying a whole heap of different cars, the general public has a vast amount of cars to choose from.
as you say, "where can you buy the specific same car as yours"
well you can't, there is only yours. there are some very similar, but once you pin your car into a very specific sector then your target audience of buyers gets very small indeed. you could hold out and wait for a buyer, could be tomorrow, could be another 6 months or more in which time the value has gone down even further.
another point is that no matter how much you have spent in maintaining the vehicle it doesn't really add that much value to it, apart from things like the cam-belt change etc.
2 points that i would adress in your advert
1/ " revs cleanly to the red-line"
i know you are probably merely trying to point out that there are no issues with flat spots that an alfa owner would knowingly look for, but the average guy in the street reads that and sees "thrashed to within an inch of it's life"
a more suitable phrase would be "revs cleanly with no flatspots"
if you wanted to put anything like that at all, which i personally wouldn't
2/ "air-con doesn't work, possibly a leak on system" at that price i would seriously expect EVERYTHING to work, especially something that can turn out to be very expensive to fix like the air-con circuit. the average guy reading that would think "if it genuinly is an easy fix, why hasn't he done it? everything else has been looked after" . they would assume you HAD had it looked at, and been put off by an expensive quote to repair. the compressor working is a good thing, but the conenser can be expensive, the pipework tricky to cahnge, and if its the evaporater then that can be a dash out job on certain cars, don't know about the 145 range.
the car is worth only what you can get for it, if you have the time and don't need to sell it then i would keep it, get the air-con fixed (you may not see it as impotant but so many buyers do) and just wait to see if the phone rings.
i did the same when i sold my 156jtd. i put it up for sale on a whim, wanting to change it. after a week or so without any serious enquiries i had forgotten about it being for sale and was still enjoying the car. about a month (yes, really) later the phone rang one sunday afternoon, the next day the guy had travelled from down south to view the car with a bag of cash. sold it for the full asking that day, although i still miss that car
just be prepared to wait and you will find a buyer
this all comes from almost 25 years in the gargae/car sales trade so please don't be offended, just trying to offer some advice
very nice car though, if i was looking for one then it would be on my list (once repairs had been made