If it's a Rickenbacker or Rick copy, you can't advertise it or sell it here.
Otherwise, your best bet would be to post in the Bass Guitars subforum for advice on pricing, [url="http://basschat.co.uk/forum/16-bass-guitars/"]http://basschat.co.u...6-bass-guitars/[/url]
(If it's a Rick or Rick copy, doing that might be construed as advertising, so you might find it was politely deleted.)
Photos will help.
Or, you could post in the For Sale section (there, photos are essential). In my opinion, if it doesn't sell in a fortnight, you're pricing it too high. If it sells in a day, you priced it too low...