Not to be confused with the concrete tower which is the subject of phone mast protests, the 1889 water tower(s) at Colne Road, Halsted in Essex have been on the market for some time at £599,950. Rightmove listing here
They may have been sold by now but at time of posting were still for sale. If you fancy a tower with four bedrooms, 3 baths and and another water tower as a home/SME office, (is this a BOGOF offer?) then get onto Wright & Co at Sawbridgeworth.
A one-bedroom Victorian water tower in Braintree is also on the market with Connells for around £200,000