i think it depends on how long they intend to keep the car... for me... i couldnt warrant the extra cost of polybuses over standard for the next 3-4 years at a push, when even if my oem bushes are shot in a year, they only cost £4 each...... an took minutes to push in...... so if i had to replace them every year (which you wouldnt in the real world) i could continue for at least 10 years for the same price as a polybush..... plus i dont track my car so really didnt need the extra stiffness a poly would give, that coupled with my replacing every bush at the front end of the car tightend it right up nicely... however, if the price of the refurbed ones where around £40 for a whole wishbone with uprated bushes that could be tempting......
Just my 2pence worth, i dont claim to be right but that was my logic....