I'm a long time content buyer of C4s, Manyvids and occasional IWantclips, just discovered ELM recently and start using it to buy content and honestly, I enjoyed using that site so far, there is one function that allows the buyer to write a script to specify what they are looking for, and any model who is interested can hit the button so the buyer gets alerted on who is interested, this eliminates the needs to look for performers who are interested in fulfilling the request, one by one. They also provide escrows feature, where the buyer would pay first and ELM will hold their payment until the seller delivers the job. I think the charges is pretty much the same everywhere else, most performers charges 5-10 credit per minute for a custom video, the highest I've paid for was $25/min. The most expensive one seems to be IWantClips, maybe it is due to the site took a huge chunk out of it, I don't know.