If you wanted to buy a bottle just talk/email/PM Paul either here or direct to his shop and he sends you a link you can click which it adds it to your basket, you can then checkout or continue shopping and buy even more stuff (like me) it is no hassle at all.
Paul just has so much stuff and I think it changes often so getting every product up there on the site would a full time job in itself. I have phoned him a few times and gave a rough description of what I want like, "I am looking for something summery perhaps lavender but not too flowery" the answer came in the form of Atkinsons English Lavender EDT which is really nice (that is on the site BTW). He is really good and never forceful, it is clear he wants you to be happy with your purchases, usually he makes some suggestions on what may fit the bill but it is open to you to decide in the end and if you walk away buying nothing and want to think about it that is OK to.
Clearly he has product knowledge, many of the vendors are very helpful but with Paul it is like talking to a mechanic rather than the receptionist, you can really describe what you want and he seems to "get it".