For those who don't know Troy Jeup, he's an M5Board vendor and sources engines/transmissions for E60 M5 and E63 M6s.

Here's a seller feedback regarding two members who bought engines from him, basically he's a crook and stay as far away from him as you can:

m5board.com/vbulletin/e60-m5-e61-m5-touring-discussion/303241-troy-jeup-sales-feedback.html