A work appears convincing. The seller is confident. The price feels justified. None of that is evidence. In the upper tier of the art market, pre purchase art due diligence is the discipline that separates a defensible acquisition from an expensive assumption. At this level, buyers are not simply asking whether they like the object. They are assessing whether the work can withstand scrutiny from auction specialists, insurers, scholars, heirs, foundations, and future buyers. O

A painting offered privately at $450,000 can look like an opportunity until one missing document, one disputed signature, or one foundation refusal turns it into a dead asset. That is the real context behind the question, how much does art authentication cost. The fee is rarely the main financial variable. The larger issue is whether the work can survive scrutiny when money, reputation, and resale depend on proof. How much does art authentication cost in practice? Art authent