If by valuation sites you mean ‘we buy any car’ etc. then ignore them…
They reckoned the Ibiza that I sold recently was worth £128. I got £399 for it on ebay.
I would sell it on ebay (cos that’s what I did). I put it on with a 99p starting price & a probably over-wordy advert explaining everything about it – what worked, what didn’t, where there was any rust etc….
I had loads in interest & about 6 or 7 different bidders in the end. It crept up fairly evenly over the course of the week to £399 and the buyer paid cash.
I put a thread on here asking for advice on how to sell it on ebay at the time that had some good posts in it…..
http://singletrackworld.com/forum/topic/selling-a-car-on-ebay-any-pitfalls-to-be-aware-of
Regarding it’s current value – dunno. Trawl Autotrader for similar cars & see what they are going for on there.
The advanced search on ebay is useful as well as you can select ‘completed listings’ and that will tell you what the car actually sold for, which is probably more useful.