The dimensions of your package are incurring surcharges due to the size. First it's calculated based on dimensional weight, not actual weight, because it's over a cubic foot. Second there's a nonstandard fee surcharge because the length exceeds 22". Third there's a $25 surcharge because the package exceeds 2 cu ft.
24 x 16 x 11 / 166 = 26 lb dimensional weight. Look up the USPS rates for a 26 lb package and add $29 in surcharges.
Some items are better off listed with local pickup only because size/weight makes shipping not worth the risk. If a buyer files a claim (even if they lie about the reason for the claim) you'll have to pay shipping both ways.
If you're determined to ship it, look into options UPS might offer, but do not purchase the label through eBay's UPS account because it will be near impossible to fight erroneous charges which happen more often than you'd expect.
