i bought some on ebay, came with like 6 different bags i think. i used em once. worked pretty good i guess. i think i paid about 30$ for them. i checked how much they were at the headshop and i think it was like 300$. maybe theirs were alot better quality? idk, but if it were me i would definitely buy them online, and hope to pay less than 50$.
You dont like ebay?? i buy stuff there all the time. like i just ordered 10 pair of chopsticks for like 60 cents lol..