I do have a few purge mods and they are expensive a/f. I dont have the Back to Basics v4 but I just looked it up and the wholesale price is $140 ish usd (converted from aud and that is here in Au) and $104.00 in the states wholesale (but sold out). With Purge you sign a minimum price agreement so that price is pretty much the min it can be sold for.
Are they worth the coin hmm depends how much you like it lol. They are really well made with perfect machining and quality control. They are 100% made in the USA the machining plant is in FL. The materials are sourced in the USA. The extra cost is because it is 100% USA made and owned. I love my purge mods and they do hit hard.
You could grab a wholesale account with https://fasteddiesvapedistro.com
You could of course buy this side piece with custom hand engraving for $1500 (wholesale price)