Ebay offers Speedo Adult Dive Mask & Snorkel Set for $12.21 (reg $29.99) with free shipping.

Product Description:
Ideal for recreational snorkeling, Speedo’s versatile Adult Expedition Mask and Snorkel Set puts comfort first and makes you ready for any underwater exploration. The mask features a convenient tight seal that keeps water out and an adjustable head strap for a customized, comfortable fit. Plus, a dry-top snorkel prevents water entry, even when submerged.

• Dimensions (Overall): 18.38 Inches (H) x 9.25 Inches (W) x 4 Inches (D)
• Weight: .99 Pounds
• Suggested Age: 14 Years and Up
• Includes: Snorkel, Mask
• Material: Rubber, Silicone, Polycarbonate