They were purchased from Toys 'R' Us for $25 USD each, so expect US retail price to be around $20. (TRU marks up their prices)
For the owners of these vids, go to:
BasicNerf's friend (blog)
On a random note, you may be wondering why the blog has been a little quiet recently. Well, education calls. Not long ago I had my school exams, so I haven't had time to write up much. Don't worry, though, within the next fortnight a few more posts should be up.