I would like to try your coils, but have no interest in Facebook,
I am citing this as an example for non facebook users perhaps?
Torchythebatteryboy in the Uk has his own vendor page on UKvapers where the first post in the thread is his current price list for all the different batteries he carries.
People then just pay his paypal email listed with the batteries they want and put a post to say order made in the thread.
Seems to have worked great for a number of years and I have done it several times.
Can you not do something similar through there or even speak to Daath on here and see if he would allow you to do it on ELR, as a small independent retailer, with a niche product. Keep an updated price list and details alongside pictures of each different coil in the first post of the thread, that you can update as necessary.
If you start mucking people about, the rep in the thread would kill your business pretty quickly, so it keeps you providing an excellent service and makes products unobtainable to some obtainable?
Here is a link to Torchy's battery thread on UKvapers to show what I mean.