What would a Never shot 75th Boy Scout 9422 be worth?

As of October 2011 - A search of ebay's complete auctions shows no past sails.

One recently concluded where the person asked for $2000 but it did not sell. Right now I can find several auctions running for $1200-1500 on gun websites (not ebay) that also have no bidders.

Based on all of this I would guess it is worth somewhere around $1000 with higher values being a stretch.

If you want to sell it soon I would list it for $900-1000 and then relist for less until you get interested. If you are willing to leave it on a site like ebay for a long time I would list higher and let it sit. I would expect less than $1000 (possibly as low as $500) from a gun dealer.