The W30 was released in 2007. In p&s terms that is very old. (Heck, I have stuff in my fridge that's older than that
)
A quick search on eBay showed they are selling for around $50-$60 in pretty much new condition, and many don't sell. Depending on the condition of yours I would think a little less than that. But of course it will depend if somebody really wants it at the right moment. Modern p&s are constantly moving forward so today's offerings should be ahead, but also the price. For example, the new WG-1 looks very interesting but I have no idea on pricing.
You can put it in the marketplace at around those prices and be open to offers but don't expect too much.
Hope this helps.
Thanks,