https://lamassu.is/ - This company has sold the most ATM so far. I have one and it works very well. it's popular with operators b/c of it's price, look, and user experience. $5000
https://robocoinkiosk.com/ - Most regard this as the best technology but are turned off by the price and the operator contract which drains earnings from the operators over a long period of time. Someone who has purchased one of these may be able to share better contract details. I'm not convinced that they are as compliant as they like to make themselves out to be but again, someone closer should be able to provide more detail on that. One thing i can say is the biometrics are of no value when it comes to US Federal and State money transmitter laws. $20,000
https://bitcoinatm.com/ - This one was absent from the scene for a while but they are back and I think this has very strong potential to be a "Robocoin killer". Not a lot of details out around this tech but I like everything I've heard and read. The company is very responsive. I think $13,000?
http://www.bitaccess.co/ - These guys have been around for a few months are are making waves in Canada. They also have the opportunity to be a robocoin killer. Same as above... Not a lot of details out around this tech but I like everything I've heard and read. The company is very responsive. I wanna say $7000ish
Skyhook - No website presence so far but they do respond to emails. I think these guys are early in the process at this point. Definitely targeting the low end of the market. $1000
I'm trying to network with as many operators as possible so if you are looking into Bitcoin ATM operation please PM me. I have lots of info to share regarding US regulation etc.