and you plan to keep the 718s for the sq setup and getting rid of the 2 amps that can easily fullfill the power need for the comps and sub u plan on getting for the build? the first things u need to get rid of are those fake 718s u have.
best of luck
though as far as the prices are concerned, u bought the stuff very expensive as compared to the market value. basically u got ripped off. the prices uv quoted are the same for the new items, so u might wanna reconsider them
happy selling