These are difficult times but not as bad as the Wave 1 & 2 era when everything but the core set was sold out. Things will be back, I just feel bad for people trying to stock up for competitive reasons, like worlds.
Another Out of stock Thread
As my friend keeps saying it's ffg you expect this kind of thing.
Really if new people stoped joining we'd have no problems 
I started playing about the time the A wing wave came out.
I've not yet had trouble finding a ship i've wanted to buy in the UK.
My sig file sort of proves that. I've also usually been able to always find somewhere that does them at less than MRP.
Usually my local store who do me a small discount, if they are out of stock and wont restock for ages then it's ebay.
When I started you could get tie fighter and advanceds but interceptors you could not find anywhere for under £30, theirs being cheaply and raising prices a few quid then there's being a scumbag and charging triple rrp.
That's why I got three defenders as soon as they came out just in case, turns out it was the z-95s that were the biggest sellers.
You do have to be willing to shop around a few different sites to get everything you want.
My local store has tons of z95, phantoms, interceptors, defenders, HWK, bombers, e wing and imp aces at the mo.
The only thing he hasnt had for a while is Y wings, TIEs and Xwings and i think they are due in again soon.
My next purchase is two boxs of rebel aces when its in the UK, poss a decimator.
I've no need for anything else really.
Tritex games, most small ships at £8.99. Postage is on order weight so cheap on light x-wing stuff.
Barnes. And. Noble.
They are NEVER out of anything.
Never, huh? ;P