Some terminology.
Pipe key - the lock has a pin upon which the key revolves (as such the key has a hole in the shaft) - These can be more of a problem to pick as the pin blocks off access into the keyhole, the better the quality the less room to get tools into the keylock.
Pin key - the lock has a hole in which the key revolves (as such the key is solid) - Although the keyhole is more open these locks are (usually) better quality with more levers etc as such may be a problem to pick.
As far as antique locks go, you can find both types by makers such as Chubb etc which you really don't want to try to pick
Paul