hmm, depends on the quality of glass, i would get double blown inside out piece where the colors are on the inside, those are the pretiest, and the price depends on where you get it, at a head shop i got a poor quality glass bowl for 50, but the best bowl ive ever had and that i lost last weekend wqas tripple blown inside out glass, with marbles on the sides and green and white swirls and it cost me 20, it all depends on where you get them, i would just buy a pipe at every place you see one and keep the one you like the most and sell the others