On Calle Varela Orbegoso, just north of Ricardo Palma, there are always guys with trucks hanging out there waiting to be hired for just this purpose. Not sure what they charge, but I imagine it's quite a bit cheaper than most official divery services.

Bob, thanks for the in-depth reply! Did you stay in the accommodations ECELA provided? Can you comment on what the apartments are like? I was planning to stay at a hostel for a couple months while studying Spanish in Lima, but perhaps living at ECELA during that time would be worthwhile. Found a few...

I'm in a similar situation to the OP. I'm heading to Peru in January, and hoping to study Spanish intensively for 3-4 months before continuing my travels around South America. The schools in Lima that advertise online seem to be a little out of my price range. Is there usually a huge difference in t...