If they are the complete 5.1 setup, then yeah they are worth it for that price.
However i was always under the impression that the 305 was just a set with center, surrounds and sub.
The only thing i would warn about, is that the amp on the S10 sub has the habit of blowing. Not very often mind, and they may have sorted that issue since i got mine a few years ago.
Assuming your mate has an amp already, the only thing that might bring on the upgraditis, is the want for a better sub.
Then it'll be better fronts, then abetter amp etc etc....
