Ok so I don't know if posting this will hurt business, help business or be a wash but I felt that it needs to be stated.
There are 0, yes zero, official OEM white iPhone 4 parts available for purchase anymore. I know this because I run a local business offering the iPhone 4 conversions. To add some credibility to my case, I won't post where I am located or even how to contact me so everyone will know I'm not just posting a shameless plug for my business.
Any part you buy from ANYWHERE or ANYONE will be a copy. There are some very small differences to the part that can't be noticed unless you are actively involved with these conversions. Just one example: the number of holes for the proximity sensor vary.
Here is the information that I'm sure will interest most people here:
Pricing for front glass assembly, ie: Glass/Digitizer/LCD is $95 wholesale
Pricing for back glass cover is $32 wholesale
Pricing for white home button is $7 wholesale
This is what I pay for the parts. I currently have my phone converted and I can attest to the quality of the parts that I use. It meets all apple standards as far as functionality and quality. There are also really BAD parts out there on the market too and I know that sorting through the good and the bad is a risk most people aren't willing to take.
The parts that the kid uses are the same ones I use so my post here should give you a general idea of the kind of money he is making with this little venture.
For those not wanting to do the math... If you factor in shipping cost that he has to pay to get the parts to him then it costs him about $140 (roughly) per whole conversion. He is selling them for $280 + $20 (sic) for shipping so he is making about $160 profit.
I know that I'm a newb here and I only made an account to write this post so do what you will with that. I'll try to respond to questions anybody might have.