I've just bought the Core Set having never played a LCG or any other similar game previously.

My question is, assuming I'll want everything (and seemingly multiple copies of some things) eventually should I make the effort to pick up everything I can ASAP? Do the card packs in games like this go out of print after a set time or will I be safe to catch up over the next few months?

Thanks.

Cards get reprinted if they go out of print.

Fantastic. So much easier to get them past the missus when it's just the odd £10 or £20 here and there ;-p

If LotR is anything to judge by, there may be brief periods of time when a specific set is difficult to find before the reprint run hits shelves, but they will get there eventually.