It's case-by-case and too subjective to really answer. Obviously the age is a factor but more important is the quality of the install and take-down by the original owner.
"But resist we much; we must; and we will much; about that be committed."
~Rev. Al Sharpton
2010 E92 M3|Silverstone II|M-DCT|NCSW|2MT|ZCW|ZPP|ZTP|302|507|Gas Guzzler Tax