SHouldn't be too much a problem. For years, I had a couple of nozzles not fire in the same place on my Epson 9900. I couldn't see any problems with the prints I produced. A few years after I purchased it, I had it serviced and all the Magenta nozzles are working. However, after nearly ten years with this twelve year old second-hand printer, the head can't be cleaned so I'm getting a new head if a few days which I hope will get me a few years down the road...
In the mean time with your 3880, start using it! When it gets to about 8000 prints, you'll need to have it serviced, but by then there won't be any parts and when that happens, put your money into whatever similar printer is available and print until it wears out.