Sellers Fee at auction

I was talking to Heritage about consigning some coins and was quoted a 10% seller’s fee on top of the 15% buyers fee the buyer will pay. Is this a normal seller’s fee I only paid 5% with Bowers. I thought this was kinda steep. Any thoughts?
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Russ, NCNE
roadrunner
would like to get for the coins.. and then submit what does not sell
to heritage.
it cannot hurt to try with some optimistic prices on the bay.
Michael Kittle Rare Coins --- 1908-S Indian Head Cent Grading Set --- No. 1 1909 Mint Set --- Kittlecoins on Facebook --- Long Beach Table 448
Authorized dealer for PCGS, PCGS Currency, NGC, NCS, PMG, CAC. Member of the PNG, ANA. Member dealer of CoinPlex and CCE/FACTS as "CH5"