Techstreet is a good US source for standards from the US and around the world. You can sometimes find it a little cheaper, but they are convenient. DIN 8605 is $54.
I often find the European approach to standards frustrating, in that they split things into multiple parts, as opposed to the US approach, where you have fewer, larger standards. There are some completely useless 7 page EU welding standards that have 6 pages of titles, definitions, and references, and one page telling you to do it right. US standards tend to be larger and more comprehensive; also more expensive, but you only have to buy the one standard. The main exception to this, in my experience, is safety standards. The EU standards are often way better than the US standards. In the US, we have the OSHA code telling us 'make it safe.' In the EU, there are more prescriptive standards, which is often helpful.
Out of curiosity, why DIN 8605? There seem to be a plethora of machine testing standards: ISO, DIN, Schlessinger, etc. How did you pick DIN 8605?
