I can't judge other suppliers on this site personally since I haven't used anyone else except Bob from Pressuretek to order parts from. (1 occassion Sunbrite had electrodes I saw on their site that was exactly what I needed)
I've seen other vendors that have some cheaper prices on some things than Bob does but the main reason I overlook that is called Piece of Mind. I can put in a order, roll over and go back to sleep and forget about it until UPS shows up with the package usually the next day.
I've never had a order get lost, screwed up, damaged or anything else from Bob.
All I'm saying is some guys might try to price shop on items. There is no price on customer service and piece of mind.
Just like if Joe Blow down the street comes up and says I'll give you your propane $.25 a gallon cheaper than your current guy. I'd tell him to go get lost in a flash. Why?
I can call my guy at 2:30 AM and tell him I ran out of propane (only happened once in 5 years) and he will get up out of bed, meet me at his station and fill my tank with no additional after hours charges.
I love loyalty, its a good fit between buyer and seller. Good relations keep you coming back reguardless of price.
We all want this from our customers but we do not practice this ourselves. Its really a shame, great post