This is what I was going to say......too much of a difference for 1/8" so something else had to be at play there.......i'll be tagging along!I asked for some quotes on 3/4". I think the 5/8" was so expensive because it's not a normal thickness and needed to be special ordered. We'll see what the 3/4" will cost. Lol I didn't think the glass would be the most difficult item to procure. Go figure..