With the possible exception of Kristen Bjorn, there is no way I would buy the entire catalogs of any of the gay porn producers. Most of them make some pretty good stuff but they make some pretty awful stuff, too.
Not knowing what to buy and if I had unlimited funds and the inclination to amass the largest gay porn DVD collection ever, I would chase down back issues of the annual Adam Gay Video Directory and cross-reference their listings of titles with a combined score of 6 or higher (that is 3 to 5 stars for production quality times 2 to 3 plusses for sexual intensity) against what is available on DVD as listed with this site. and I'd buy the titles with an average score of 3 or more from the GayDVDReview section of this site. At least that way, I'd avoid most of the real dogs that are on the market (& there are a lot of them! ).
Once I had my lists, I'd use the price search engine to find the lowest-cost purveyors of the items on my list - dividing it up into a series of, say, 6 lists from a series of the online e-tailers. Finally, I'd email my 6 lists to each of the respective companies, telling them that I would like to make a large bulk purchase and that I would like them to give me their best offer as to a discount against their regular prices (which would already be the lowest ones I could find) for the items on my list.
At least, that would be my strategy.
~ GaySatyr

