If you plan to purchase a Baron 58P, my advice would be to do an annual"at a shop of your choice" as a pre purchase inspection. For about $3,500 at a good shop they will open all of the inspection plates etc and tell you what the problems are. The choice to repair or adjust the price will be for the seller to make. If you then buy the aircraft after you have adjusted for any major issues such as fuel leaks, elevator actuator malfunction, hot plate failure, low compressions and so forth. This is your best security for a good purchase.