I run a small business that sends out 2,000-5,000 envelopes a month. What we've been doing is printing the shipping addresses on stickers and placing them on the size 10 envelopes, and then we have a stamp that can be used for our return address. We also have another red stamp for "Show Invitations." We did try to use our Epson ET-2803 for our needs, but it could only do like 3-5 envelopes a minute. For some reason, it pauses a few seconds before doing the red invitation part. We then bought an HP M554 since it was labeled as doing 35 PPM, but we quickly learned that was only for regular paper, not envelopes. So it can just do 3 pages per minute to keep from overheating. Is there any printer that I could use for my business? #business source