problems to look for are
misting/condensation in front and rear lights
ratling dashboard
windnoise from mirrors and door seals
ratling boost pipe on bottom left of engine bay
pulling left steering
uneven tyre wear
rust on bottom of wings (between wing and side sill)
rear washer jet popped off
clunking springs
these are the things i would look for to knock price down
welcome to seat very good car and very underestimated!