Keep in mind that madmarky has 20" Axis Penta splitrims. 
Being splitrims, it costs more to refurb than a forged one-piece wheel. 
  
He'll prolly have to have all the dishes re-polished and the centers powdercoated, hence the £100 per wheel price. 
  
They are Ascarii Penta's not the Axis ones BM!   
  
My wheels need a lot of work hence as BM said the high price. Mine have a diamond cut lip which takes some time to replicate i think, plus im having mine powder coated in a special metalica chrome paint, im sure it all adds to the cost. They do do one day turn around on some wheels depending on damage. 
  
Next time i speak to the guy i will see if theres any discount he may be able to offer for us forum members, hes a nice chap and it dont cost anything to ask.