That sounds like a decent price, it depends on what condition the knives are in and how much you want them. If they are all new then that sounds like a good deal.
I would like to expand on what Addicted said.
It sounds like a very good deal to me, which makes me wonder.
First, you should be sure that you are, in fact, getting the genuine article, and that you will get the knives once you pay your money. Beware of eBay shenanigans....
If these knives are in need of repair, you should know what it will take to return them to working order. As Addicted said, if they are "new", "like new", or "lightly used", then you are getting a great deal, although those terms do leave some room for interpretation.
If these knives have chipped edges, uneven bevels, broken pocket clips, broken springs, sloppy pivots or locks, etc....
Then it may not be the steal you think it is.
Before you pay your money, ask some questions. If you don't like the answers, save your cash.