The ones I just sold were 2 years old...paid 90 cents for them, sold at $1.01 (12% return, 6% APR) not a good return compared to other biotechs I have owned. The shares I kept I bought in 2007/2008 and have 143% return so far. Note that they are actually "freebies", because I had sold enough in 2008 to recoup 100% of my original investment.
Please realize that I am talking minimal shares here....now own only 3,000 just to keep my toe in. I'm a biotech junkie! ;-)