Help me decide re: Pioneer VSX-1121

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I purchased the receiver from Amazon (Warehouse Deals) used-like new for $449.99.

Received VSX-1121 from Amazon and seems that previous buyer reported a defect with the TV/SAT optical input...return info was in still in box.
The condition of the outer Amazon packaging was in normal condition, but the original Pioneer box was held together with duct tape! There was a hole "punched in" about the size of a softball on the side of the box.
Opening the package, the styrofoam that protects the receiver was also taped up to keep it together.

Carefully examining the receiver and it's contents, I found a scratch/dent on the front right along the edge about 1/2 inch long (not noticeable unless you look for it)...other then that it visually looked new.
Content within was new and not opened...except the remote and batteries.

Tested TV/SAT optical and result was defective...no sound output.
Not sure if I set this up correctly, but won't be using the optical since my TiVo is connected via HDMI.
Everything else seems to be working correctly. I haven't completely tested all the functions, but the ones I use are working.

Contacted Amazon twice and ended up receiving a $50 refund...still have 30 day return and 1 year warranty from Pioneer.

Now this is where I need the advice:

Should I keep it. Saving me $100.

Keep it and purchase SquareTrade One-Year Open-Box Electronics Warranty: Open-Box Items $200-$2000 for $44.99.

Return it and purchase a "NEW" one from Amazon directly for $499.99.


Any help will be greatly appreciated!

I posted this at AVS Forums too...need all the help I can get!


THANKS!