Where can I get QUEEN-Concerts on DVD?

Hello everybody! I've bought some unreleased QUEEN-concerts on DVD (Rainbow, Hammersmith, Hyde Park and Earls Court) from queencollector.com, but their quality is not as good as I have expected and as was described on the homepage; in fact the quality of Live At Hyde Park is very poor. Does somebody know where I can get these concerts on DVD, but with good quality? Thank you very much!

You know, the problem is, I have a very slow modem and connection, that's because I'm looking for DVDs, but thank you anyway.

How much did you pay for each?

15$ each

daria-- I have those concerts (and several others) on DVD. I don't know if the quality is better, but I can send you screenshots so you can see the picture quality of the DVDs.
and I will be glad to send you any DVDs that I have in exchange for the same number of blank discs.
Please email me if you are interested