Can get seduced by the local marine convenience store (WM.) Aside from ranting West Systems (Gougeon Bros) for foisting blush epoxies on the inexperienced, they do have packaging down pat. And they're the only act on the shelf. It is also true we are paying for the convenience of having the store down the street: taxes, morgages, salaries, utilities - that game forces the prices of everything up. (WM is a publically owned company and is probably worth more in real estate than inventory. Who knows what they're into. Who owns West Systems, for example? The CEO of WM makes a paltry million and a half a year. Good ole Empire building goin on heare!)
For that little bit of wait you mention, online suppliers offer greater selection and better epoxies at half the price. The site I use sells 'marine' epoxies without the added surcharge. They are often what industry and the military use. The only problem I've found is eclectic containers. And maybe too large quantity. My white tank coating, for instance, requires a gorilla to open the plastic pail part A comes in. Decanting the thick creme into small batches takes invention and patience. What the hell...
At least I'm not married to WM's consumeroid choice. Happy pumping!