M3 value

[doaburp]

Hi all, going to sell my m3 convertible and was wondering if you guys could help me out on a valuation as I'm not to sure how much to put it up for. Its a 2004/04 steel grey with red leather, 33000 miles with every poss extra inc hardtop. Wheels and tyres perfect, one previous owner.
Thanks in advance.

[doaburp]

Not desperate to sell quickly only problem being the time of year, i feel if i want to sell i may have to put it up at quiet a cheap price.