Like you, I have a 155 Veoce, in all the years i have been changing my cars all i can say is, there is never a good time to sell your car, and regardless of condition, colour ( i have never had a colour thats popular, according to Mr Dealer ) etc,etc, you will generally get a poor price/deal, it will i`m afraid be in the dealers favour, unless you are very, very lucky.
There is only one way, and thats to sell privately, if you can in these times.
I guess it depends just how much you want it to cost you.
Best of luck, hope you get a good deal, and at the end of the day, you are happy with it.
Every time I end up by convincing myself that i have had a good deal