I was watching that episode and loved seeing that Tommy Gun - beautiful condition with nice drum and accessories. I was really tired and struggled to stay awake to watch the auction. My guess was that the ensemble would sell for just shy of $20,000......
BUT I DIDN'T MAKE IT TO THE END!!!!
How much did that beauty fetch in the auction?
Oh, and FWIW, he would have been nuts not to accept that gun in his auction even if it couldn't fire. With AC556 parts sets going for close to $2,000, a broken Tommy Gun (receiver intact) would sell for only a bit of a discount to one that fires perfectly.