Assuming you mean Copic Sketch -
According to both of our local art shops, supply will be picking up again by this summer. Right now, I've had some luck picking through our Artist & Craftsman and Michael's locally. Michael's charges $7.99 but you can get 30-40% off coupons regularly so it's not too bad.
Also look on eBay, several sellers are usually auctioning off small "lots", typically around $5 apiece.
It's a shot in the dark, but sometimes you'll find them on Craigslist, worth a search now and then.