Great advice...thought I'd add mine to it. I usually buy used glass. It isn't the lastest/greatest/new and improved...but it has always seemed to me that when a new model of anything comes out, folks get rid of last year's "latest/greatest/etc.", sometimes even in MY price range! Paid $700...
We've been doing the vacuum packed, then frozen bagel/bacon/cheese/pb and sometimes honey for a few years. My wife calles them butthole sandwiches because that's what they look like. Two per day, and something dehydrated for dinner. Top Ramen works too, especially when one is on a budget.