OP, unless you are in a burning hurry, read a lot here first.
If in a burning hurry, then caveat emptor.
After reading, BUY USED.
Read the TB classifieds to see what is "main stream."
Right now, a lot of Genz gear is up for sale.. problems or the future of Genz... who knows.
$100 won't pay for a parking ticket in a big city.
Don't expect $100 to buy anything other than a micro practice amp, or something with Big Problems.
I see a lot of Gallien-Krueger (GK) used gear in Craigs List.
Consider their Backline series of amps and cabs.
These are Hecho in China, but is quality design and equipment.
In your place, I would look for a Backline amp, and 2x10 BLX Backline cab.