1999 BMW Z3 2.8 for $7,500 — is it worth it with 100k miles?

A 1999 BMW Z3 2.8 convertible is listed for sale at $7,500. The two-seat German roadster appears to be in good condition with minimal modifications, but has nearly 100,000 miles on the clock. The piece questions whether the asking price is justified given the mileage.