I know drop downs have been discussed here and I just received my order from DKGLOBE on DHgate so I figured I would share my experience.
http://www.dhgate.com/store/product/2pcs-lot-glass-dropdown-14-4mm-female-to/215586818.html
I was able to get 6 different drop downs for only $25.59 with shipping
All of them do have a few bubbles where the joints are welded to the bar, but hey it's from China for $4.27 each. I didn't expect perfect quality haha
These drop downs are sold in lots of 2. I didn't want 2 of each drop down so I messaged the seller first asking if I ordered 3 lots for $25.59 would they be able to send me the 6 different drop downs they offer. He said yes and I asked if I should leave a comment on the order during checkout and he said yes. So I placed my order and left this comment on my order during checkout:
"Please send these 6 items: 1 - 14mm female to 14mm female; 1 - 18mm female to 18mm female; 1 - 14mm male to 14mm male; 1 - 18mm male to 18mm male; 1 - 14mm male to 18mm male; 1 - 14mm female to 18mm female; Thank you!"
These 4 are perfectly straight:
18mm female to 18mm female
14mm male to 14mm male
18mm male to 18mm male
14mm male to 18mm male
*note: the 18mm female to 18mm female has a slightly longer tube compared to the other 5 (the one on the very right in the pic)
This one is slightly crooked (not bad at all though. maybe 5-10 degrees off):
14mm female to 18mm female
This last one is pretty crooked though (usable, but not straight by any means. probably 15-20 degrees off I would say)
14mm female to 14mm female
I re-ordered a lot of the 14mm female to 14mm female. I am hoping that one of the two new ones I receive is a little straighter. If not no big deal because it was less than $9 lol.
So if you are looking for a cheap drop down, I would recommend this seller.
If you are looking for perfect straightness, this is probably not for you (unless you get lucky like I do where the majority are straight. However, this could have been dumb luck and others could be pretty crooked too. So buy at your own risk)!
Anyways, even after ordering a second lot of the 14mm female to 14mm female adapters, I have only spent $34.12. Pretty damn affordable for 6 drop downs IMO
I spent $40 for 2 drop downs (14mm male to 14mm female and 18mm male to 18mm female - the 2 that DKglobe does not offer for sale) from GreenBuddhaShop. They are perfectly straight, but you can tell they are made in China like the rest of his stuff. the 14mm one has the bar welded on the left side of the joints and the 18mm one has the bar welded on the right side of the joint
Not a big deal but I was kind of like ummm
ha!
http://www.greenbuddhashop.com/CLEAR-GLASS-DROPDOWN-14MM-OR-18MM-DD.htm
I wish I would have purchased those 2 other drop downs I needed from AmericanGlassStudio on iOffer. I have purchased a few of their rigs and they make pretty good quality stuff for the price. They are hand made in NY too by Apollo Glassworks
http://www.ioffer.com/i/10mm-14mm-19mm-glass-drop-down-oil-rig-bubbler-adapters-585133923
I think
@Monsoon ordered some drop downs from AGS on iOffer so I am anxious to hear about the quality.