RE: Mini nitro RC's
Ooh... I like that NB1 on the page you linked to, but one mini is enough for me.
and you're right. These things are a novelty, so get the cheapest one you can find, and then do as many "free" or "very cheap" mods as you can PRIOR to running. If you find it fun, then you can think about spending a little more money on it later.
Good Luck. I think every nitro car guy ought to have a mini, but after one has a 1/8 or 1/10 MT, Buggy, or whatever they like.