Best deal: $0.04 per count (63.7% below the median) — Mead #6-3/4 Envelopes, 3-5/8" x 6-1/2", Security Printed Lining for...
Price range: $0.04 – $5.23 per count across 49 offers. Median sits at $0.10.
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Mead #6-3/4 Envelopes, 3-5/8" x 6-1/2", Security Printed Lining for Privacy, Press-It Seal-It Self Adhesive Closure, White All-Purpose 20-lb Paper Mailing Envelopes, 500 Count (742021)
SUNEE #10 Security-Tinted Self Seal Envelopes – 500 Pack White Windowless Mailing Envelopes, 24LB Printer Friendly for Business, Home & Office Use (4-1/8 x 9-1/2")
Mead #10 Security Business Envelopes Letter Size 4-1/8" x 9-1/2" – Peel and Seal, Privacy Lined, No-Window, Press-It Seal-It Self-Adhesive for Home & Office Mailing, 500 Count (740010)
Columbian #10 Security Envelopes, 500 Pack, Self Seal Envelopes for Home, School, and Business Mailings, No Window, 4-1/8 x 9-1/2 Inches, Durable 24 lb White Paper
HERKKA #10 Security Self-Seal Envelopes, No.10 Windowless Bussiness Envelopes, Security Tinted with Printer Friendly Design - Size 4-1/8 x 9-1/2 Inch - White - 24 LB - 500 Pack