Re-issue vinyl vs. the original pressing

I prefer originals as well and although I have several thousand that I purchased when they were released or within several years thereof (mostly 60's and 70's), I continue to add to my collection using eBay. Taking certain precautions, I have been satisfied with most of my purchases -- understanding that nothing from the periods I collect will be "perfect/pristine". I buy only vinyl rated mint minus or better -- excellent/very good++ etc. have almost always disappointed. I buy from sellers with established positive track records (as suggested by Hdm) located in the USA. Unrelated to quality -- I don't buy from sellers charging absurd postage/shipping (matter of principle). As Hdm intimates, it's still a bit of a gamble, but I figure I can lose a few bets at eBay prices and still beat the price of most re-issues. My two cents.