I would say $3,000-$4,000 auction price on Gunbroker if they are in mint condition and the serial numbers match. Sub gauge Wingmasters were hot last month on GB and bringing around $2,000 auction prices but they have cooled off a bit lately and are in the $1,500 final auction price range currently. I have been following 28 gauge and .410 Wingmaster prices recently because I wanted to purchase a nice 28 gauge to shoot. I found one locally in mint condition from the turn of the century for $1,800 private sale. He wasn't going to budge a nickel from his asking price and I was not leaving the parking lot without that Wingmaster.
Yes, we would love to see pictures of them. That would help tremendously.