Assuming it was a complete set of Snap-on, and all in good condition, and the box was actually full. I'd consider ~$10, depending on the details. But $20k? Don't think so.
sell it one piece at a time
she could get some dough - e bay too
my friend mike wanted out , got fired [on purpose ]
needed seed money for new company
sold an easy 100k dollar box , complete , 7500
1 auction
that way , he would never have an excuse to get back in
it is what flat rate does to people is whats so heartbreaking
he landed on his feet , computer networking company , grosses over 500k a year with 1 man and some contractors