"I was thinking around 13.5k? "
I paid less than that a few months back for my 05 STI PPP with £9k mods with only 8800 on the clock, tax mot etc so possibly room for more? Looking at the market it doesnt seem strong so really depends whether he needs to shift it quick or not... same with your BM mind so it works both ways...
But looks like a nice 'base' car for your usual 'uprating'... haha