Bmw 318 i 2 ltr for swap or sale

Looking to swap for something with a slightly smaller engine, willing to accept cash my way on a downgrade. shes got limo black rear windows and a slight tint on the fronts, blue interior lights & msport alloys shes got all the mod cons, cruies control, air con, cd player with aux, got a few age related marks but nothing major 136 k mileage but still runs like a dream because shes been serviced regularly (oil and filter change last week) and with a 2ltr injection engine she pulls train she been well looked after and had money spent on her got loads of recipts (just had o2 sensors changed) and service history . Any more info just ask.