Nice find - but even that one isn't going for $500
As a comparison a new NA BMW PE can be found @ around $1000 shipped
on the forums usual selling price used is $800-850
That's only $150-200 off new price, and people have a feeding frenzy to snatch them up at that price - and that's for a part that shows deterioration during use as it's exposed to the elements.
A used strut bar isn't going to show any use from new, under normal circumstances, so why would a selling price of 1/3 the original cost be fair?
2009 328ix E92//SGM//ACS Roof Spoiler//MTech Aero Lip+Trunk Spoiler//M3 Side Skirts//CF Roundels+Grilles//M3 Novillo Interior//Perf Shift Lever+Boot//MPerf DCT Wheel//M3 GT3 eBrake Handle+Boot//ACS Pedals//M3 Mirrors//LCI Tails w/LUX Rev//LUX 160 AE+MTec 6000K D1S+HPB HID 6000K Fogs//HPB LED Interior//RPI Scoops//CF Euro Airbox+Underhood Hsgs//K&N//BMW PE//MTech Rear Bumper-iS Sport Diffuser//CF Strut Brace//AA Stage3//BMW 193M's+Kumho 4X