you might also want to check out KEH camera brokers
they have a no hassle money back refund ...

i'd pay with paypal and figure the camera + lenses need a CLA
SO ... figure that into the asking price ...
the reason i would pay with paypal is because if the camera
is not as described you have 45 days to return it for a full refund ..
sometimes people that acquire "stuff" lie through their teeth to sell it
and say it is a like new wedding present or found in my grandma's attic or whatever
and it turns out it was harvested at goodwill broken and marked-up 1000%

at the very least ask if you can bring it to a repair guy and have it looked at
( like you would a car to a mechanic ) ...

have fun !