I think that in general westerns are more popular in Germany than in Holland or Belgium.
I cannot remember that Garden of Evil was ever shown on TV over here. In France the western is more popular, and therefore I often buy French DVDs when in Brussels. One of the problems for me, living in the North of Belgium, is that the French language has become less popular. Flemish people above the age of, let’s say, 45-50 usually speak French, not perfectly, but like most younger people speak English these days. As a result French books and comics were widely spread in Flanders, today French books have only a small stand in a library and French comics are read in either Dutch or English translations.
On TV the situation is hopeless. French television used to show a lot of westerns, but the younger generations have taken over and westerns have become far less popular (I guess the DVDs are bought by my generation). In Holland and Belgium Sergio Leone is virtually the only name younger people recognize, his films are available on DVD (stock permanently renewed) and his films are shown on TV every now and then. Still, when A Fistful of Dollars was shown on TV a while ago, I got two phone calls from TV magazines who wanted some info.
The American western has become a matinee genre. On Saturday afternoon networks occasionally have a western on the program, usually a John Wayne vehicle (The Comancheros, The War Wagon etc.) or one of the films of that special group of classics (3:10 to Yuma, High Noon, Shane, The Gunfighter, Clementine, The Searchers, Rio Bravo, El Dorado, Liberty Valence and a couple of others). That’s about it. Spaghetti westerns have always been a bit more popular, at least in cinemas or on VHS. Apart from the Leones, they have hardly ever made it to television, and I guess they’re not a good investment on DVD (and fans buy DVDs on the net).
I might have underestimated the popularity of The Professionals a little, but I don’t think it’s one of those titles instantly recognized by wide audiences. Cat Ballou is probably only remembered for Lee Marvin’s nose (I asked a couple of film critics if they knew the movie, and after a while one of them said: Oh yeah, that’s the one with that nose!). Note that the film was an Oscar winner, note also that it was one of the most popular American westerns from the sixties with enormous grossings, most probably third after Butch & Sundance and True Grit. That’s why I said it was a more or less ‘forgotten’ movie.
I’m afraid this tendency cannot be stopped. Virtually every movie is available these days (DVD, download, PPV, etc.) but this also means that everybody has its own “niche” : fans stick together and what they watch or like is of no concern to large audiences.