A decent st185 group A will set you back anywhere from 18 for a roughy to 22K upward
st205's start at about 25K from local searching and ours are the st205 Group A WRC model - which had a few extras as mentioned like non funtioning anti lag system , water injection , and a water spray for the heat exhanger.
the uatralian ones are very hard to find - and the 15 year law hasnt kicked in yet for jap imports so your going toi have great fun finding one ..