"Now, one of the iconic boxes found near one of Edinburgh's most famous locations has just gone up for sale - and it could be yours for less than the price of a new car.
The Jubilee phone box, which can be outside the National Library for Scotland, on George IV Bridge in the capital, is on the market for just less than £8,000."
Now, since it has heritage status you can't alter or move it but as the article says you could use it for a small business...coffee or shop, bookstore. etc. according to the folks doing the listing for sale. It's in front of the National Library of Scotland so I think it could house a successful business.
Great idea to see these wonderful phone boxes preserved.