I'm no expert....but I'm giving you my opinion anywayz.
So it is with great humility that I throw myself at the feet of your collective expertise and ask...where should I start?
Start by figuring out what license u liked the best. Whether its Alien, Robocop, Marvel....whatever.
Then see whats on the market for those licenses.
I need advice on what are trusted manufacturers,price ranges,should you buy second hand and if so what are the pitfalls?
Sideshow Collectibles and Hot Toys are the big bosses around these parks....but once ur more involved in this forum , u'll learn about all types of reliable companies. Second hand toys can be an option, but as mint as they say they are....u never really know what they have done to it or with it. So if you do buy second hand, i suggest that u ask for how long they've had it and if they can give a hi res pics of every angle of the fig to make sure they're no damage.
Prices can vary...Hot Toys are usually around the $150-$200 bracket, while bust and statues are usually in the $250 -$400 bracket (rounding off)...but some can be higher or lower, depending on the quantity that they produce, the quality of the product (materials they used, level of detail, etc...) or the demand. The Ironman license has a big demand at the moment....so anything Ironman sell out quick and is a little more expensive.
Should I buy posable figures or stick to busts and statues?
I know alot of people are nit picky when it comes to they're collection. But I collect whatever I think is bad ass....So I can't really help you in this case. But I can say that u can probably buy two poseable figures for the price of one Bust/PF Statue.
So...like I said...I'm no expert...but I thought I chime in.
Good Luck with ur new hobbie.