After seeing Pricebeat's post I had a look at what else is available. These look good as they're much tougher than the cheap thin stuff.
It's CL3-rated which means it's designed to be run behind walls in a commercial environment. The difference is that they'll release less toxic fumes if there's a fire.
10ft / 3m - $10.15
25ft / 7.6m $10.67
35ft / 10.7m $12.59
6ft / 1.8m - $20.91 (ha)
75ft / 22.86m $12.71 (1 left)
100ft / 30.48m $14.20 (1 left)
Also decent is this THICK 25ft/7.6m HDMI cable for $16.79.