I had to order another 1,000 #10 envelopes with my return address printed on them, from Envelope Superstore.  Last time I ordered these was December 2019.  Cost was $152.81 for envelopes and $27.87 UPS shipping, for a total of $180.68.  This time it's $140.97 for envelopes and $40.64 UPS shipping, for a total of $181.61.