Deal from the latest catalogue starting tomorrow.
Key Features
6.4" AMOLED capacitive touchscreen
8GB Ram
128GB storage
Mediatek Helio P70 chipset
48MP(wide) + 8MP(ultra wide) + 2MP + 2MP rear cameras
16MP selfie camera
4025 mAh battery
VOOC Flash Charge 3.0
In-Display Fingerprint 3.0 sensor
Ultra-thin Design
What you're describing isn't strictly dropshipping. That's where the seller doesn't hold the stock themselves and have the supplier send directly to buyers.
The problem with limited quantities is where do you draw the line on sale items? I.e. how do they determine quantity and which items. From the seller's p.o.v. they want to get rid of stock and/or generate traffic from loss leaders, both of which are achieved from sales. Unless there was a benefit to them to have as many unique buyers as possible, incentives are low for that to happen.
If you need a phone, they go on sale all the time. Just have to keep looking and waiting for one that suits you. Lots of phones come up on here sub $174.