How do you figure?
The same site lists prices for potassium cyanide and arsenic pentoxide by the kilogram. Do you really think they’re gonna sell these substances to “a regular person” ?
If you don’t think that a regular person can buy arsenic and cyanide by the pound from this website, then how does a link to their website go any way at all to addressing how hard it is for a regular person to get those substances?
But since you think the answer is clear, then perhaps you can tell us in plain terms: how hard is it for a regular person to get chloroform? Do they just have to fill out the order form and get it delivered to their door? Is there a waiting period? Do they need to produce a licence of some sort?
Since a fair answer is apparently available from a link to that webpage, I look forward to seeing the answer to these questions shortly.