Maximum cost of a single bondage / BDSM item?

What is the most you would consider ever spending on a SINGLE piece of bondage or BDSM gear? Assume it fits your needs perfectly. It may be custom made or otherwise currently unavailable.

Also - consider as a point of discussion that a single prostitute / sex worker / stripper may charge $20 - $2000+ depending on what part of the world you are in, what the setting is (street walker vs outcall) and how "high end" the service you are requesting is.