I had 2 Unlimited ones, and 2 sets of Mox but sold them all in the late 90's. The last Lotus went for £140. A bloke took the train over 100 miles to get it. He got a bargain.

Your better off getting a set of proxies. They can be found sometimes on ebay. I have a fake Beta Lotus here, but you can easily tell its not real. Sleeved they will look real enough for casual play.