Thinking of selling my 17" Borbet Rondel's.

Have a set of 4, with nearly knackered tyres, 2 new spare centre caps, keys to get the caps off etc etc. Wheels are not damaged, but the paint is flaking off here and there. Pics attached. (They are filthy dirty in these pics and do clean up ok)

What do people think they would be worth if I was to sell them?