It's not that there are no good products, but that good products don't circulate, I found an interesting thing, the new moving room, there are a few big cockroaches are very nasty, I bought a pack of boric acid on Poundland for 5 fast money, and then bought a potato for 1 fast money, steamed and put some sugar, and kneaded it into a small ball. Then I found the cockroaches all dead, through a simple chemical principle can get him dead, and will not have resistance to drugs, than those what chemical bait is much better. There are also some German Bayer and so on sell a few dozen dollars but simply can not kill all the cockroaches. I suddenly thought of some durable, effective and good products, and will not always be in the market circulation, because of capitalism, like greed, to constantly satisfy the desire, like my family used to sell printers, obviously there is a demand, but as long as the cheap on the line, the people who buy it do not care about the other. Canon is not durable but cheap, Brother's laser printers are very durable but cost about three times as much. The result is that those people often hold the Canon for repairs and complain every day about the poor quality. I think a good product is not necessarily a good item. Not in the lasting interest of the seller or the manufacturer.