Unless there's no other option, don't sell a gun"because you need themoney". You won't get much for it anyway, and you're better off keeping it. Now, I could see selling a gun or two so you can buy another gun, such as a Savage smokeless.

Brenneke 2.75" KO Sabots are $8 for a box of 5, rated for 1600 fps, 1 oz slug .63" diameter (as opposed to .5" like many others). I'm shooting them this year after Win BRI style slugs went over $11-12 a box.