On the Question of H. Tirolf...
There appear to be two artists working under the name "H. Tirolf." One is the artist first mentioned, known to have been working in Europe from the late 19th to the early 20th C. The other is the artist mentioned, the one being sold on eBay, are paintings produced to take advantage of the confusion. These paintings were done in a somewhat similar, rip-off style as the original artist, but were painted in the mid-20th C. and sold exclusively through stock art houses to motels and businesses (and at motel sales to the public). If you have a painting that you believe to be from the original H. Tirolf, one cannot comment on value until a real auction record is formed, although it should be noted that he was, indeed, a very good artist. If you have one that is in a cheap 1950s- 70s frame, though, then you can figure it is worth between $25- $75, depending on size and quality of the work. (You can tell the frame is modern as it will almost certainly have been made in Mexico, and so will likely have the word "Hecho" imprinted somewhere on the back.)
If you see someone selling one of these paintings, as the signatures tend to be pretty similar to keep the confusion high, a strong clue as to which artist they have (besides actual style) is that the seller will usually call an antique an antique, and the modern piece will very likely be referred to as being "vintage."
This is the same sort of thing that was done to the work of American artist, G. Whitman. His originals are quite beautiful and some may be of great value, but the stock house renditions are so low-grade art, they have made collecting his work almost impossible for the average buyer.