I have for sale a Worcester Bosch Greenstar 25si (24kw output) Combi Boiler in excellent condition. It was working perfectly when removed carefully by a Gas Safe engineer due to needing a bigger boiler.
Although it does not come with a flue, I am including the wall bracket / jig in the price. (I am actually also selling in another advert a brand new flue if you are interested in also buying this.)
In the photo, the controls cover looks a slightly different colour but it is actually exactly the same white as the rest of the white casing - must have been the light / shadow when I took the photo!
Cash on collection.
Happy to answer any questions you may have.