Jailbreaking an iPhone 4?

I jailbroke my iPhone 4 iOS 4.1 and LOVED it until I discovered that I was still sup to have the Apple App Store in it & Cydia. I had noticed from the beg that my app store was gone & I thought that was normal. Even tho I loved having the phone jailbroken I did a lil research cuz my batt was draining in 1/2 a day & some Cydia apps just weren't working so I unjailbroke it on iTunes & it automatically updated it to iOS 4.2.1. I'm so bummed now cuz all the jailbreaks I know of aren't working w my phone yet & I didn't save the SHSH blobs cuz at the time I didn't know I should. Anyway I check the Internet daily to see if an untethered jailbreak for iOS 4.2.1 is avail without SHSH blobs & nothing yet from the known hackers. I did come across a website called ineedjailbreak.com & it says they can jailbreak ANY iPhone w any iOS for $19.99. It's a one time unlimited use fee. I've been willing to pay money for a working jailbreak so my question is do I purchase this? Why would this company have a working jailbreak when the iPhone Dev Team doesn't? And if they do have one avail is it untethered? I don't like the idea of plugging my phone in if I need to reboot it. Is there anyone out there that can explain how this whole process works? And also if u have any other ideas where I can look for a legit jailbreak. Ive never had a smart phone b4 & I was really disappointed when I discovered that Apple literally won't let u do ANY customization to ur phone. What u get is what u get. I did so much research on what smartphone to get & regret getting it. Shoulda went with the HTC Evo. But--when it's jail-broken I feel I'm getting 100% out of my phone & have no regrets. And b4 anyone lectures me about getting pirated apps just an FYI-- for me Jailbreaking isn't about getting "free apps". I could care less about paying .99 or a couple bux for an app--that's why I wanted to unjailbreak it & redo it--to get my App Store back. I just like the customization that Cydia adds