I recently broke my One's LCD. The display worked and the digitizer still seemed functional since it registered touch. So, I called HTC and got a quote to repair it. They advised me 'up to $180'. So I sent it in last week. They got it on Thursday. They emailed me this past Tuesday advising the repair would indeed cost $180. So, I paid via debit card and I'm now waiting for them to finish the repair and send it back. I live in North California and I sent it to Houston,Texas.
Hope everything works out for you.
Edit: another thing to consider is... This device was rated a 1 out of 10 in terms of repairability by iFixit due to the unibody design and such. So, I personally wouldn't trust any non sanctioned (by HTC) 3rd party to work on it. Better to send it to the manufacturer since I'm sure they have specialized tools for dismantling it.
Oh - and one other thing.. $180 is cheaper than AT&T's insurance deductible but I'm sure the repair time will take longer than it would to get a replacement (probably a refurbished unit) from AT&T.
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