It's possible to get Pentax cameras of the 60's & 70's serviced for around the 45-60 mark by a repairer in Derbyshire, UK who lists on the Uk ebay site as Camera Repairer. He will do models other than just those he lists. I've used him for a Pentax Super ME and he was fine. These prices include replacing the light seals & mirror bumper & you can be 100% sure they will need replacing after 30 to 40 plus years.