Trade In and SAVE Trade in your old hearing aids (in any condition) and receive $350 trade in per hearing aid when you purchase a pair of the revolutionary Signia Styletto hearing aids from HEARING SAVERS. That's a saving of $700 per pair. FREE Styletto Portable Charger with every pair of Styletto hearing aids valued at $415. Your trade-in hearing aids will be donated to SHHH (Self Help for Hard of Hearing), a voluntary non-profit organisation established in 1983 to support hearing-impaire …