I didn't know I had two broken rear springs until the dealer service told me and charged me $500.
But when the front spring went, there was a loud clang when turning hard left or hard right. The mechanic (not the dealer) immediately suspected a strut and sure enough when he put it up on the hoist, it was there plain to see.
The bummer is, it effectively decreases my buyback
Three things:
1) Yep so many springs does seem excessive, but it's not uncommon
for VW springs to fail apparently, although I never had broke springs
in other cars (or my VW for that matter) in over 38 years.
2) Snow, salt doesn't help. You get corrosion, pitting, then fatigue crack.
3) Don't fix it, sell it back as is. Just be careful and drive conservatively.
It could (will likely) affect handling and stopping to some extent.
I recently replaced my shocks and struts myself. I did not buy new springs,
and did not want aftermarket lower springs. I was nervous taking it apart,
I'd find broken springs and have a show stopper. Springs near perfect, with
the factory finish is excellent shape. There was a little rust at the bottom
of rear springs where they sit in lower control arm cup. Typically they crack
down there in the first loop from what I have seen online.
Cost to replace rear springs should not be $500. It is about an hour of labor,
total both sides. The cost for a pair of springs is $120. $250 should have done
it, $300 even, but $500 is a little steep.
Struts are going to be closer to $500 to replace springs. However if a strut spring
breaks change the spring and struts out both sides as well (for a car you are keeping).