Premium Silicone Tubing

See some WC sites are selling Premium Silicone Tubing for $2-$2.50 per ft. It seens very expensive to me. Are those tubings that expensive or just WC site makeups? I need about 10ft for 2 systems & that could get real expensive.

I used PVC type tubings before but I wasn't too happy with it. I check McMaster-Carr website but I don't know what those premium silicone tubings call. Polyurethane, Polypropylene??

Where can I get this type of tubings locally? I live in San Franscico Bay area. I can't find it in OSH, Ace or True Value Hardwears. Maybe Home Depot & auto supply store?

What problems did you have with vynil tubing? I bought a bunch of it for my watercooling rig, and I know lots of places where it's in use in my house right now. Plus, it's only 36 cents/foot(canadian money, so for anyone in the USA that's probably only 20cents/foot)

12 cents actualy exchanger rate is about 33% now. I just know this cuz im gonna go to canada and buy some Paradigm speakers cuz they are hella cheap in Canada.

Vinyl tubing worked fine for me. I got it cheap at Home Depot.