A few people have been scammed on the site, Only use paypal to pay for items for sale by other members. If they will not use paypal, its likely a scam NEVER SEND E-TRANSFERS OF ANY KIND.
Definitely get to the grandstand, check it out on practice day, or the fanzone in nobles park. Definitely ride the mountain, I go through laxey to Ramsey then turn off at the Creg and go round again, the mountain isn't as busy as you would think just keep an eye on your mirrors, no speed limit...