Resistive touch control, Slow switch control, Linear power supply to avoid switching noise, 2.8 inches diagonal screen, Optional TTL USART port on the internal PCB (SW not yet implemented), 16 bits per RGB pixel, Display resolution 320 * 240 pixels, USB serial port control.
Get coupons, create price alert or check price history out! Let’s see what best price is ATM.
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. There is no active coupon in my database right now (for Banggood).
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BG09975, 7d18f7, BGherra, BG11SHOP, BGG09975JP, BGJPiio024, BGG09975CZ, BGG09975, BG1G09975
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Here is price history (for all/most countries) for Tinysa 100kHz-350MHz Tiny Spectrum Analyzer. The lowest price was: $48.99.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).