Originally posted by paulh to see if new seals or a CLA is in order. I
Better to simply do test the seals and mirror foam yourself. The easiest way is to take a toothpick and press it into the light trap grooves on the back of the body (film door open). If it does not feel springy or if it feels gooey or if chunks of dust/crud fall out, it is time to redo the seals. The same goes for the mirror damper foam at the front of the focus screen in the mirror box (lens off).
After having said that piece, your seals are likely to be in good condition. KEH generally does a full check on everything they sell before it goes out the door.
Steve