Argh!

Not long ago I wanted to return to my childhood hobby of collecting model cars. Back then I used to collect 1:24 and 1:18 models. Unfortunately, I only have 1 or 2 that survived to this day in decent condition. What prevents me from coming back to this is the sheer cost of those models.

So, Opponauts, do you have any tips for starting a HW collections? Maybe you'd have some tips on where to look, what to look for, what to ignore, the cost of all this, etc.?