I think you may be asking for the impossible. Well maybe not. I think that your question needs more details. The following information would be useful:
- What you are mounting on the equatorial mount? Is it a telescope or a camera? How big of a telescope?
- What are you trying to photograph
If you are trying to photograph deep sky objects through a mid sized telescope, I don't think you will find a mount in your budget range, unless you can get one used off of ebay or some such. The tabletop equatorial mount might be appropriate if you're just doing the sky. However, for a telescope, just the motors for a good equatorial drive will set you back $100 or more....
If you are only trying to photograph planets or the moon, you won't need any tracking ability to get spectacular photographs.