The following promotion is directly from Jpay:

Sunday was Daylight Saving Time, so even though you set your clocks forward, we are rolling back prices!  JPay is offering 10% off stamp purchases today through Friday, March 16, 2018!

We hope this promotion makes it a little bit easier to stay connected with your loved ones.  You may purchase the promotional stamp packages on JPay.com, the JPay mobile app or by calling our toll-free number, 1-800-574-5729. This promotion is only valid for friends and family, not incarcerated individuals.

PLEASE NOTE:  The 10% off discount is already reflected in the price shown on JPay.com and the JPay mobile app.  The current purchase price reflects the discount, which means the discount won’t be imposed during checkout, rather the promotional price is currently displayed.

Participating locations: California (only California Institution for Women, California Substance Abuse Treatment Facility, Central California Women’s Facility, High Desert State Prison, Kern Valley State Prison, Marin County Jail, TAFT Correctional Institution), Colorado, Florida, Georgia, Idaho, Indiana, Kentucky, Louisiana, Michigan, Missouri, Minnesota, New Jersey, North Dakota, Ohio, Tennessee (only West Tennessee State Prison), Texas, Virginia, Washington and Wisconsin (only Milwaukee House of Corrections).

Promotion valid from Monday, March 12th, 2018 at 9:00 AM EST until Friday, March 16th, 2017 at 9:00 PM EST.

Note: Combine this discount with our trick (email us or comment on this post for details) to get 60 stamps for $9.00  during this promotion.