depends on what your planning on doing-
You can have perimeter drains put in- with a pump for upwards of 5K
You can "drylock" the basement walls/floor with a paint- for about 20 bucks a gallon
We drylocked our basement because all we had was seapage. It was a long process, but well worth it
My neighbor has the drains- and love it
The other thing to remember is to properly grade your lawn- sloping away from our house....a lot of people have a perfectly flat lawn from the house out- and that causes problems
gutters too
hope this helps
Brandy