SS, prices vary so much that it's difficult to say. There was a brown one posted on here from Gumtree, in a cabinet, lovely condition for £30, too far for me or I would have jumped at it.
My first one cost me £30, but that included a free 99k as well! The second one was a gift.
Check out your local charity shops, although they do have to PAT test the electric ones.
Ebay, can be a good source, but some people want ridiculous prices.
Jessie