As far as the show equipment I always just sold it for half of what it was priced at new, it was all taken care of but had some hours/use on it. The trailer first check the tires, look for the mfg date, how old are they, they may look fine but if their over 8 years you will definitely have to replace them. Is it an aluminum floor or wood, if wood what condition is it in. if it is all in good condition it is probably worth what they paid for it, Looking at what they are selling for his purchase price would be a bargain.
Chute: $500 (894.50 new)
panels: $350 for both (299.99 New)
Fans: $250 for both (New 252.500 each) Check fans blades, cords,and cage if anything needs replaced knock 50 off
$11,500 - $12,100 For everything