1300 is a good 2 weeks for a 3880. Guessing something else is up. Try printing on another type of paper and try to work out where the problem is. Guessing it's a paper issue but you never know. That said they are so cheap that I can't imagine considering fixing it if out of warrenty
Already tried that other thin-paper stuff, even on Widest. No go, even with thin typing paper. Why it slices the right edge 1/4" in and curls it up is very bizarre. I can't see anything that is cutting the paper there unless the print head is dropping down and something is cutting it from underneath. It doesn't bend up the edge (Isn't striking there, and I already know that from the BC thick-crap paper that does edge-curling upwards and got pushed sideways in the rollers.). It just slices "inside" the white border and fluffs it up, and then scrapes off the ink over the rollers. Sounds like loud galloping horses when head is moving across the paper, even with thin stock now.
It will print (although small) using the front feed, but either the top or rear feed causes the head strike and rubbing off the ink over each roller. Something has caused the platen to rise too much, or the head is dropping down too far. Looks like there is a motor for each in the service manual so maybe one froze up? No doubt the head is damaged to. There is a deep groove in the back of one of the thicker papers from the roller pressing up too far, or the head pressing down too hard and rubbing off the ink.
No call back from service as to price either (So what else is new there?).
Fwiw, I dropped by another shop I know who has a larger Epson. He hauled it to some independent shop 250 miles away to fix. Never got it back, even though he gave the guy $2,500 for some parts up front since the guy didn't have the cash to buy the parts himself. Should have known better, but it is gone, and maybe sold on Craigslist or eBay, so he thinks. He tried a local guy with the newest one, but it took him 3 months to fix it, and it's acting up (9900) again and looking for a new service person.
I've been reading Yelp reviews looking for service centers and seems some reviewers lose theirs as "Beyond economical repair" so the repair place "Takes it for disposal (allegedly) and no money offered for the used and broken one." Probably fixes them and resales the thing if they collect enough parts. I had that pulled on an Amana refrigerator once that was a week out of warranty and the compressor blew out. Repair guy wanted it bad too, even after I bought a new one and trashed the old one.
Guess it is garbage can time for the 3880. Had a good two year run though. I see Epson only allows for only 5 rebates to the same address too. So one every two years will be it in 10 years, although they might have a new model by then too and start all over.
SG