My sister loves this kind of thing – she has a ~1K golden hind, some steam train and 40 bazillion bits of rock, plus loads of others that I ran away from inspecting.
I did ask about getting it all finished – there are mainly 3 people at her newsagent that get everything brought in (just for them), plus you can buy copies that you missed.
She loves the magazine of facts (shamelessly robbed from wikipedia 😉 and everything asociated with them.
She knows she is ripped off and is weening herself off them as she started to get a steam train, then dad showed her a steam engine model that he had that you can can buy for half the price (kinda, his is 30 years old and awesome) and is twice as good (although he has ran out of the proper fuel for the boiler)>