I'm a bit different to some of the replies - when i've sold a machine locally (different story if its hours away), i have mentioned that if anything happens with the machine in the first couple of months, i'm happy to come and help out fix the problem - parts at the buyers expense. I figure there are so few people in the hobby, if i can help a newbie out, they might become more interested and tell their mates about the hobby.  In fact last weekend i went and looked at two machines (one was my old shadow, 2 owners later) nd ended up not charging anything for a few minor repairs, prob drove 50km or so and blew 3 hours.  Both guys were interested and appreciative and learned how to make adjustments/minor repairs themselves. They also said they had a few mates interested in the hobby.

I've had a couple of guys really frustrating who continually ask questions, but over time, they have learned a fair bit from the advice i've given them, so good outcome in my mind.  I just remind myself that this is a hobby, and the only way other people will learn is if we teach them. 100% agree with the sentiment that people should be able to search a bit themselves, but remember some of this is so new (and possibly intimidating) to them, they wouldn't know where to start searching. Some people don't know how to describe a lockdown bar, flippers, pop bumpers, ball trough - all things we take for granted.