Well..I called Staples back around 11 PM EST tonight...Waited on hold for quite a while until I got this really lovely CSR who was very helpful. First I asked her if I could add the TV on. She said no problem. All she had to do was charge my card for $.01 and then put a credit for $.01. I said sure, that is fine with me.
Then I asked if I could PM more than once, especially if the order was created using a PM. Since I PM'd with Comps4Sure to begin with, I had to pay an extra $6 in shipping. So I asked if I could PM against Onvia and wind up with a $6 credit. Well maybe I'm rusty in my math..this is what happened...
Original was...158.99 + 5.75 (Shipping) - 40 (Coupon) + 9.04 Tax = 133.78....PM to Comp4Sure...
PM to Onvia was 159.10 + 0 (Shipping) - 40 (Coupon) + 8.63 Tax = 127.33
Diff of $6.05. I should have gotten 6.05 back. Instead she credited me $10.90
Total came to $122.88.
Now I'm not going to argue...hehe
Thanks to everyone who posted information pertaining to this deal.