i have had to replace a 1/2" pane that was 20h and 13w, that ran me 13 bucks i believe.
i also had to replace some glass for a hood, and those are 24" L x 6-7"w and 1/4, he gave me 2 of those for 13 as well, and even rounded the corner to reduce the chance of getting cut.
16400 Pearl Rd
STRONGSVILLE, OH 44136
Phone: (440) 238-3866
there is also a true value hardware on prospect (in strongsville) not to far from that glass place that also sell glass, never used them before but they do sell glass in the back.