One of my favourite sites, which has apparently disappeared, was avia-n-aero. It had upwards of 4000 photo images of Russian aircraft on it, a lot of them Operation Barbarossa shots, taken from ebay.de. I thought I'd give this a try myself, and you can too!
(1) Go to the German e-bay site:
http://www.ebay.de/(2) Choose the category "Sammeln & Seltenes" in the drop-down menu of the right-hand field of the "Finden" bar; I used "foto" and "Russ" as key words in the left field of the bar. Click on "Finden". Someone who actually speaks German (I don't!) might be able to refine this process better than I can, with suggestions of where else to search.
(3) Scroll through the search results and look for descriptions including familiar names, like "MiG-3", then open that page.
(4) Be sure to click on the low-res thumbnail to get the high-res image.
(5) Right-click the high-resolution image and save it to your "My Pictures" folder
We can all become amateur VVS photo researchers, digging in the goldmine of ebay.de!
Today I found a Yak-9T image and three MiG-3 images which I saved, plus several others (I-153, SB, TB-3, Po-2, etc.) which I didn't.
If anyone has suggestions on how to improve this process, or finds anything really amazing, please let the rest of us know!
John