I wanna buy an application to jailbreak and unlock iphones?

I have 3 iphones that 2 of them I have corrupted trying to jailbreak them by watching youtube videos on how to do the jailbreaking and didn't work to perfection. Well, I don't want to blame them, so I saw this website http://unlockjailbreaktool.com/pricingand I would like to get a response from you to see what you think? Maybe you know another site. Please let me know.

I jailbreak my iPhone form http://iphonejailbreak-unlock.com, you can jailbreak your too and price is only 9.99$. This is only lowest i found.