Yes I bought an SL4 Sport, which comes with the frame in tasty matt charcoal with red trim and a mix of Tiagra and 105, as well as a long-cage derailleur and an 11-30 cassette. It seemed like the cheapest way to get my hands on an SL4 frame in a colour I like; the 105/Tiagra kit has now gone onto the older SL3 along with the derailleur and the cassette so my son gets that bike with a useful climbing gear. I get the SL4, which is now mostly Ultegra equipped (swopping all the shifters etc over was an epic) and I will sell my old 2006 Roubaix to help cover the cost of the trade-up, most of which comes from the cheque my employer gave me for 25 years of faithful service!
Eventual cost of the exercise = £0.00.