Hmm, a suggestion when you are looking at glass with marble-work... The marble should be melted in at least to its widest point, any less than that, and you run the risk of it breaking off, and it just looks bag, in my opinion.
Good job, dude. I was thinking, "I hope he has enough weed to smoke out of all those pieces..." Instead you turned profit, good job.
Marble-work refers to the glass knobs on the side of the pipe. It is generally a sign of poor workmanship when they are stick out too far, as they are much easier to break off. Just some pointers when looking for quality glass.