SFlySnuka:
I suggest you RUN from those ebay 150/1400 scopes. Those things have some of the worst reputation of any scope and often have cheap, flimsy plastic parts and that infamous correcter lens in the focuser with allows a 1400mm focal length in a short tube. Those inbuilt barlows reduce image quality and make collimation a royal pain up da backside.
Here's a review of one of these things:
http://www.cloudynights.com/item.php?item_id=1105
For $500-600 you can get a nice quality 6-8" EQ mounted newt or a 8-10" dob from Bintel or Andrews.