It looks like Banggood is releasing a new and even cheaper Racerstar ESC running BLHeli_S. It looks like they are all 2S-4S and here are some spec I copied from one of them:

Brand: Racerstar 
Item name: MS Series 35A ESC
BEC: no
Cont.Burst: 35A45A
Battery cell: NiXXLipo 5-12NC2-4Lipo
Weight: 7g
Size(mm): 14*27*5.5 (W*L*H)
Program: yes

I wonder if this is a rebranded ESC and if so, what type? The previous Racerstars where rebranded Cicada Sunrise and I think it is a quite good ESC, so it will be interesting to see how good these ESCs will be.

http://www.banggood.com/Racerstar-MS-Ser...615201601R

http://www.banggood.com/Racerstar-MS-Ser...615201601R

http://www.banggood.com/Racerstar-MS-Ser...615201601R

About a week ago I had a Racestar 20a Blheli-s blow up in my face on the bench during a esc calibration. I order a Armattan F1-5 RxR in which they installed these Racestar's, but sell Sunrise Cicada's in their shop. They aren't exact copies of them as two chips are placed differently. Barely a week old esc's that had less than 15 flights and blew up. In my opinion Sunrise or Aikon Blheli-S are better quality.

No problems with the racerstar 20A v1for me yet