You can now download over 33,000 sound effects from the BBC archive

Ask them how much they'll sell commercial rights for.

Remember that FOSS is the exception in this economy, not the rule.

You can.

>Pro Sound Effects operate the commercial licensing of BBC sound effects. If you wish to use any sound effects commerically, you can click the 'Buy sound' button in the 'Show details' section of any listed sound effect.