I'm a bit shocked to see fancy carp at these prices. Koi were cheap once, really cheap.
Found this site;
Koi as cheap as $19.95 but the shipping is a killer unless you buy several.
Shipping is a flat rate of 49.00 per box in the continental United States, and only $10.00 for local Shipping no matter how many Koi you buy.
They make a good point about KHV in Koi forums. You need a quarantined area before releasing new fish into a pond. An above ground pool might suffice.