Okay, my question is not about guitars but I hope that someone will help me.
I bought Gem Jumbo 61 r6. It's a combo organ - http://www.youtube.com/watch?v=IMsIbdDjq4s for the psychedelic band I am a member of and I think some reverb will make it sound even better. Unfortunately I won't be able to spend a lot so would you recommend me something for 70-80$? Thanks in advance!
Buy a used pedal!

Not sure on prices where you are but can you pick up a Digitech X Series Reverb?