Here's the fun part about cockers. You can upgrade them with relative ease. A stock cocker with nothing touched can probably shot around 6-8 bps (just a guess). But all you need to do to increase it is get a trigger job (get the thing timed better) most shlubs at the field that shot cockes should be able to do this (or better yet, show you how). After that you can piece your own custom cocker together with the parts you want.
Don't look at buying a cocker as buying a complete gun look at it as buying a box of leggos. The posibilitys and potental is limmitless!