I forgot what I paid for my 1.5" one that I use for the gray water
tank. But it'll be less than a new hose if you need to cut it for servicing the seacock ;-)
I have no problem removing the black wire reinforced hoses from bronze or marellon hose barbs. You get that problem when you never take the hose off for years. Twist the hose so that the wire spiral opens or help with a flat screwdriver between hose and barbs.