I miss Sree's wagon at CMU. $3 for a LARGE lunch: two veggies curries, a daal, and some nan (nan is not the greattest but not bad), and that was in 1999. He made a dish called carrot methi that I have tried, without success, to reproduce, and have found nowhere else. I would usually eat 1/2 for lunch and take 1/2 home for dinner, which...eating largely on $3 a day anywhere is almost impossible.
I don't think he had any meat options at CMU, at least not back then.
Looks like the prices have gone up to $5 since then- still an amazing deal.