I should have qualified with my location to be clear. Those new Seagates haven't made it to our shores either - not available from my local cheap parts store.

I bought a 3TB WD green for AUD$135 just this week so similar money to you. A 4TB WD black is $350 though and other 4TB drives go up significantly from there.

Edit: Maybe they have but from the online retailers starting from about $220 + $10-20 shipping. I usually buy from my local guy since it's easier and usually cheaper.