FREE: Vivitar 2000 electronic flash

The listing, Vivitar 2000 electronic flash has ended.

You can see that this has got some decent firepower. If you need some extra light to bounce off the walls or the ceiling, for some really nice shots, this puts out plenty. The battery compartment is clean, check it out, with no corrosion, and uses 4AA batteries to pack that firepower that you see in the picture.
DSLR cameras:
I DO NOT advise connecting this to a DSLR hotshoe directly, unless you know for sure that you won't fry your camera's circuitry with the first few shots. There is, however, the Wein Hot Shoe to Hot Shoe/PC Socket Safe Sync Flash Adapter that you can easily pickup on Amazon, eBay, etc., which will then reduce the voltage to acceptable levels.
OR you can have the flash fire as a "slave flash" (as in the pic). The pic of the flash in action was taken with it as a slave and I used at least 1 dark blue colored filter to buffer the light. If you "diffuse" (tone down, buffer) your primary (shooting camera) flash, and use a slave flash, say pointing up, or bouncing off the wall, that should then give you some nice photos. Use this technique with your phone camera's flash to increase the ambient light. You'll need to have an "optical sync" to go along with it, though.

Good luck, God bless!