I guess I'm the one who has taken this thread off in other directions and, if that offends you, goldenheart96, then I'm sorry.
By mentioning the question of resolution, I assume you do not want an original but a good quality copy to put in the file in your computer. If you can find a suitable picture on eBay, as you say, but it has writing on it, just save it and use Photoshop to cover the writing.
If you don't want to buy Photoshop, then download something like General Image Manipulation Program. It goes under the unfortunate name of GIMP but it is free. It is pretty sophisticated (probably too sophisticated for what I want) and it is not user-friendly, especially for a newcomer to this sort of thing. However,it comes with a self-help guide and, though a rank amateur at these things, I managed to get it to do what I wanted after a few tries. These things do take time and care but some of the results can be quite dramatic. Most of the MK images are recent, so it should be fairly straightforward. You should try cleaning up photos from old magazines and newspapers ,or concert adverts from the dim and distant past ,or even articles taken from microfilm - I can tell you from personal experience, they take hours and are really fiddly.
If you get GIMP (or something similar), my recommendation would be to grab the image you want in the uality you want it, from wherever, save it in your file, then copy it using the "Save As" facility, giving it the same file name as before but with an addition (say: "copy 2" or "Improved") at the end. This means that you can do the image manipulation work on the "Save As" image. This has two benefits: (1) if you make an irretrievable mistake, you've still got your original image and (2) if you do a good job, you can switch back and forth between the original downloaded image and your manipulated/improved image and bask in the wondrous results of your endeavours.
I should have said, GIMP does come with a Back button, so, as long as you haven't saved the changes you've made, you can always go back. You should, periodically, check if you're happy with the changes you've made, however, and then save those changes, in case your PC goes into freefall or something. As I said, this can be a time-consuming process and you wouldn't want to lose all your hard work.
Here's the Wiki report on GIMP:
http://en.wikipedia.org/wiki/GIMPAnd here's the official site:
http://www.gimp.org/And, I repeat, it's free.
Now, where was I?