What is a good place to buy psychedelic "research chemicals"?

Silk Road. Google it.

Using Quora to source psychedelic drugs is a totally unacceptable (and illegal) use of this website. By referring to any research chemical as "psychedelic" you are implying human consumption, which makes it just as illegal as the scheduled analog it is related to, and the specific example you referenced (The "2C" series), consists almost entirely of controlled substances that are illegal in most parts of the world.

The Internet

You can easily http://www.chemicalservices.net/ but you require some legal formalities. Because most of the online shops provide the chemicals only for laboratories or for research purpose.

Hey, you can buy research chemicals from any online store. But as Caitlyn said, you need to complete some legal formalities for this. Also, you can buy legal research chemicals from http://rcfly.net and http://flightams.com. They are Eu's based company that sells top quality herbal incense and research chemicals at affordable prices. Also, there products are 100% genuine and safe. Apart from this they provide FREE sample with every order. But they provide chemicals for lab purpose not for human consumptions.

The beta ketone of 2CB is legal in some countries. It's easily sourced through websites that sell research chemicals. Alternatively you can download Tor and connect to one of the darknet websites that facilitate sales of illegal chemicals.