Another note, you may want to research the Wingmaster a bit further. I was reading in this other forum (link below) that it is the opinion of a couple posters that the older Wingmasters are superior to the new ones in fit, finish and smoothness. I am not sure where the cutoff date is for this, so you'll have to do some digging. FWIW, I've had good success buying used guns locally and thru the internet (and having them shipped to my local FFL). You can ask for internal pics of the gun's action, and ask about rust, etc. 870s are hard to break, even if they've been neglected.
http://www.thefirearmsforum.com/showthread.php?t=5667
Here ya go...I think 1963 is old enough, LOL!
http://www.gunbroker.com/Auction/Vie...Item=183021134