Dresden, Germany: I got a very similar call today from http://horizon2020projects.com/ looks like these guys follow people who got ERC grants. It was 2 pages of text to be written in 2 weeks, for £7500. After I hesitated, it became one page with an exceptional price of £2000 but I was asked to keep it secret :) And she had "meeting in 10 minutes" (although the conversation lasted half an hour or so) and I was to answer immediately. All requests to communicate via e-mail and give me time to think were rejected. I hang up the phone in the end, but she tried to call again.