Get a pre-purchase inspection by a qualified independent. Bentley 2005 models had the least features and worst defects of the lot. Being a 2005 means check when the shocks were last replaced, when the hose above the transmission was last replaced, the third brake light replacement date, when all window glass was replaced due to discoloration / delamination... Set aside $5k to $10k for the occasional bi-annual problem.

 

The pictured CGT has a free Carfax report on Ebay listening. This car does not have a strong dealer service history. Many owners avoided dealer service due to cost. In the end the last guy has the hot potato. This could be a good car but you don't know. The interior and exterior where the easiest to take care of, so they look great. Suspension, brakes,vacuum leaks are some of the pesty ones. Scanning the ECU is a quick way to find out if there are stored fault codes, that imply vacuum leaks, catalytic converter or O2 sensor issues (engine removal for any of these).

At a cost of $10,000 less one might be willing to take a shot. This particular example is on the high end of the spectrum.