I order bulk cartomizers from Eastmall.com. They're Chinese, and their shipping is $17.00, but their cartos are $20 for 25 cartos ($4.00 for a pack of five.) The don't actually say BOGE, but they are, I believe. They have the silver sleeve instead of the gold. They work like BOGE (I like BOGE) so even if they're not, they are good...they work the same. Love them. AND....their shipping is WAAAAY faster than most of the companies in China. I got my last order in 5 days.