I don't think they are overpriced necessarily, but they often only stock top tier brands. I can get decent 4:1
epoxy intended for laminations shipped to me for around $60 a gallon total from a number of places. West charges almost $100 a gallon just for the resin and you still have to get hardener and pay shipping (or tax in my case, since there is a store nearby). I will concede the point that you get higher quality product and better support at that price, but the lower quality stuff doesn't fail. It is usually just about the same, but sometimes the 6 hour might take 7.5 hours to set and I have to clean amine blush off between coats. And if I wonder if it is okay that it took an extra 90 minutes to set and has a hazy surface, there is no one to call. I am okay with that on some products and want to be given the option.
The same is true with a lot of their accessories. I can see their side of it; they don't have to apologize much. And I know people who shop there because they are confident that they will be getting quality stuff even if they might have saved money elsewhere.