Joyo British Sound - $15 Some very nice mid sculpting.
Joyo D-Seed - $25 Interesting and different types of delays. There is a reverse option that can make some cool stuff.
I have only ever used these with a power supply. I assume they work fine with a battery.
The D-Seed is the original not the D-Seed II. I am sure you can find a lot of info online for both of these pedals. Email only, no trades, no deliveries.