This product has been discontinued, so you may find it at outlets or discount places such as TJ Maxx. In fact I bought the 5oz tube on beautyticket.com for $13. I thought this was a reasonable price at the time. The discontinuation of the Damage Therapy Masque is not surprising to me for one reason: it doesn't work.
Perhaps it works if your hair is not as damaged as mine. But my hair has been bleached twice with multiple dye treatments on top... and as a result it is quite dry. While my hair has not melted nor broken to pieces, it is slightly elastic when wet. I apply this mask after shampooing my hair in lieu of hair conditioner and I use it 1-2x per week. This mask does not add much moisture, shine, nor manageability to my hair. Following rinse, my hair is just as tangled and twisted as before... with that slippery feeling of conditioned hair. After blow drying my hair, my hair does not look any better when using this product.
Overall, a product that simply does not work nor deliver.
Pros: Smells good. Easy to dispense with the tube.
Cons: Expensive at full price (~$30), discontinued (perhaps trying the "Mending Masque")