Yes, I'm very well aware that there are sub-standard parts and material coming in from china and I have no intention to buy any of this. But often marine stores will charge it's customers a lot more for the exact same product just because it's "marine".
In my estimation I took prices from marine-stores, swages and turnbuckles are from Seldén (same brand that for example Hallberg-Rassy and Najad uses).