Oh, sorry, I see. No, they're not. Aside from most people shying away from hyphens, one thing that makes a domain valuable is rarity. With word-jumbled-hyphen-domains there are too many combinations to make them rare. If someone is selling flowers-roses-cheap.com for $100, why don't you just register any of these for $6:
roses-flowers-cheap.com
cheap-roses-flowers.com
buy-roses-flowers.com
buy-flowers-roses.com
roses-flowers-buy.com
flowers-roses-buy.com
romantic-flowers-roses.com
romantic-roses.com
romantic-flowers.com
roses-flowers.com
flowers-roses.com
cheap-flower-bouquets.com
cheap-flowers-bouquets.com
bouquets-roses-cheap.com
roses-flowers-bouquets.com
flowers-roses-bouquets.com
bouquets-flowers-roses.com
roses-bouquets-flowers.com
bouquets-roses-flowers.com
bouquets-flowers-cheap.com
roses-flowers-bouquets-cheap.com
flowers-roses-bouquets-cheap.com
bouquets-flowers-roses-cheap.com
roses-bouquets-flowers-cheap.com
bouquets-roses-flowers-cheap.com
That's about 1% of the combinations.. get the picture?