Jim, the percentage that is thrown around most commonly these days is 25% to 35%. 35% being the most common when the list prices go higher. 40% is pretty common at RV shows when the MSRP is boosted fairly high.
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Jim and DW 50 years Brenda
2018 40rssa and 2021 Jayco Eagle 40'
2019 F450, ruby red
Harley Road King & sidecar