A:Answer BestBuy ordering is strange.
They have a regular full LOGIN and they also have a "GUEST" login for one time purchase.
Depending on which way you go into their online ordering site(s) may vary what you are able to see, and do and buy.
Couple of things.
1) This same TV has been as low as $349 and SIMILAR ones as low as $299 -on Black Friday at another company, and a different but similar Brand - Phillips, not Westinghouse)
2) If all else fails go "Old School" and try calling the toll free number for best buy and ordering it through them. Make them get it and deliver it to home or at least local store for free
If they can't or won't then consider your options and let them know that !
Hope this helps